Bell Telephone Laboratories, Inc. List of Significant Innovations & Discoveries (1925-1983): Difference between revisions

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The first iteration of this list was compiled by [[Bell Labs|Bell Labs]] alumnus [[A. Michael Noll|A. Michael Noll]] in May 2012.   
The first iteration of this list was compiled by [[Bell Labs|Bell Labs]] alumnus [[A. Michael Noll|A. Michael Noll]] in May 2012.   


[http://www.ieeeghn.org/wiki/index.php/File:BTL_INNOVATION_LIST_GRAPH.pdf (original list)]  
[[Media:BTL_INNOVATION_LIST_GRAPH.pdf|(original list)]]  


Original Notes:<br>  
Original Notes:<br>  


*Compiled by A. Michael Noll (with personal knowledge and an admitted bias toward speech research and computer graphics) and with sagacious comments from several Bell Telephone Laboratories colleagues.
*Compiled by A. Michael Noll (with personal knowledge and an admitted bias toward speech research and computer graphics) and with sagacious comments from several Bell Telephone Laboratories colleagues.  
*Bell Telephone Laboratories, Inc. (BTL) was formed in 1925 and existed until the breakup of the Bell System on January 1, 1984. Only this period of nearly six decades is included here.
*Bell Telephone Laboratories, Inc. (BTL) was formed in 1925 and existed until the breakup of the Bell System on January 1, 1984. Only this period of nearly six decades is included here.  
*Innovations and discoveries were chosen to be significant new directions and not just incremental advances. However, a few “fascinating” ones, such as the “dunking bird,” have been included.
*Innovations and discoveries were chosen to be significant new directions and not just incremental advances. However, a few “fascinating” ones, such as the “dunking bird,” have been included.  
*Tens of thousands of engineers, scientists, technicians, and others worked at Bell Telephone Laboratories, and all contributed in their own way to the overall accomplishments of the organization. Only a small few are listed here though.
*Tens of thousands of engineers, scientists, technicians, and others worked at Bell Telephone Laboratories, and all contributed in their own way to the overall accomplishments of the organization. Only a small few are listed here though.  
*On many of the larger development projects and systems, large engineering teams were involved, and accordingly individuals are not named.
*On many of the larger development projects and systems, large engineering teams were involved, and accordingly individuals are not named.


{| width="600" cellspacing="1" cellpadding="1" border="1"
{| width="600" cellspacing="1" cellpadding="1" border="1"
|-
|-
| '''Year'''
| '''Year'''  
| '''Innovation or Discovery'''  
| '''Innovation or Discovery'''  
| '''Innovators'''
| '''Innovators'''
|-
|-
|1925
| 1925  
|Electrical Sound Recording
| Electrical Sound Recording  
|Joseph Maxfield &amp; Harry Harrison  
| [[Oral-History:Joseph Maxfield|Joseph Maxfield]] &amp; Harry Harrison
|-
|-
|1925
| 1925  
|Quality Control Theory
| Quality Control Theory  
|W. A. Shewhart
| W. A. Shewhart
|-
|-
|1926
| 1926  
|Thermal Noise
| Thermal Noise  
|John B. Johnson
| John B. Johnson
|-
|-
|1926
| 1926  
|Antenna Arrays
| Antenna Arrays  
|R. M. Foster
| R. M. Foster
|-
|-
|1926
| 1926  
|Permendur Magnetic Alloy
| Permendur Magnetic Alloy  
|G. W. Elmen
| G. W. Elmen
|-
|-
|1927
| 1927  
|Negative Feedback Amplification
| Negative Feedback Amplification  
|Harrold Black
| [[Oral-History:Harold S. Black|Harold Black]]
|-
|-
|1927
| 1927  
|Television Transmission
| Television Transmission  
|Herbert E. Ives
| Herbert E. Ives
|-
|-
|1927
| 1927  
|Quartz Electronic Clock
| Quartz Electronic Clock  
|Warren Marrison
| Warren Marrison
|-
|-
|1927
| 1927  
|Transatlantic Telephone Service
| Transatlantic Telephone Service  
|Many contributors
| Many contributors
|-
|-
|1927
| 1927  
|Wave Nature of the Electron
| Wave Nature of the Electron  
|Clinton J. Davisson &amp; Lester. H. Germer
| Clinton J. Davisson &amp; Lester. H. Germer
|-
|-
|1927
| 1927  
|Wearable Electronic Hearing Aid
| Wearable Electronic Hearing Aid  
|Harvey Fletcher
| [[Harvey Fletcher]]
|-
|-
|1927
| 1927  
|Telephone Trunking Traffic Analysis
| Telephone Trunking Traffic Analysis  
|Edward C. Molina
| Edward C. Molina
|-
|-
|1928
| 1928  
|Sampling Theorem
| Sampling Theorem  
|Harry Nyquist
| [[Harry Nyquist]]
|-
|-
|1929
| 1929  
|Artificial Larynx
| Artificial Larynx  
|Robert R. Riesz
| Robert R. Riesz
|-
|-
|1929
| 1929  
|Broadband Coaxial Cable
| Broadband Coaxial Cable  
|Lloyd Espenschied &amp; Herbert A. Apfel  
| [[Lloyd Espenschied|Lloyd Espenschied]] &amp; Herbert A. Apfel
|-
|-
|1929
| 1929  
|Ship-to-Shore Radio System
| Ship-to-Shore Radio System  
|Many contributors
| Many contributors
|-
|-
|1929
| 1929  
|Frequency Interleaving of TV Signal
| Frequency Interleaving of TV Signal  
|Frank Gray &amp; John R. Hefele
| Frank Gray &amp; John R. Hefele
|-
|-
|1930
| 1930  
|Moving-Coil Microphone
| Moving-Coil Microphone  
|E. C. Wente &amp; A. L. Thuras
| E. C. Wente &amp; A. L. Thuras
|-
|-
|1930
| 1930  
|Negative Impedance Repeater
| Negative Impedance Repeater  
|George Crisson
| George Crisson
|-
|-
|1931
| 1931  
|Radio Astronomy
| [[Beginnings of radio astronomy|Radio Astronomy]]
|Karl Jansky
| Karl Jansky
|-
|-
|1931
| 1931  
|Rhombic Antenna
| Rhombic Antenna  
|Harald T. Friis &amp; E. Bruce
| [[Harald T. Friis|Harald T. Friis]] &amp; E. Bruce
|-
|-
|1931
| 1931  
|TWX Exchange Teletypewriter Svc
| TWX Exchange Teletypewriter Svc  
|Many contributors
| Many contributors
|-
|-
|1931
| 1931  
|Stereophonic Recording on Film
| [[Stereophonic Sound|Stereophonic Recording on Film]]
|Harvey Fletcher
| [[Harvey Fletcher]]
|-
|-
|1931-32
| 1931-32  
|Stereophonic Sound Rec. (45°)
| Stereophonic Sound Rec. (45°)  
|Harvey Fletcher, Arthur C. Keller
| [[Harvey Fletcher]], [[Oral-History:Arthur C. Keller|Arthur C. Keller]]
|-
|-
|1932
| 1932  
|Stability Criteria Diagrams
| Stability Criteria Diagrams  
|Harry Nyquist
| [[Harry Nyquist]]
|-
|-
|1932
| 1932  
|Waveguide Experiments &amp;Theory
| [[Waveguides|Waveguide Experiments &amp;Theory]]
|G. Southworth, A. King, A. E. Bowen  
| [[George C. Southworth|G. Southworth]], [[Oral-History:Archie King|A. King]], A. E. Bowen
|-
|-
|1933
| 1933  
|Equal-Loudness Contours
| Equal-Loudness Contours  
|Harvey Fletcher &amp; Wilden A. Munson
| [[Harvey Fletcher]] &amp; Wilden A. Munson
|-
|-
|1933
| 1933  
|Vitamin B1 Isolation Process
| Vitamin B1 Isolation Process  
|Robert R. Williams
| Robert R. Williams
|-
|-
|1933
| 1933  
|Stereophonic Sound Transmission
| Stereophonic Sound Transmission  
|Harvey Fletcher
| [[Harvey Fletcher]]
|-
|-
|1934
| 1934  
|Raster Scan TV System
| Raster Scan TV System  
|Pierre Mertz &amp; Frank Gray
| Pierre Mertz &amp; Frank Gray
|-
|-
|1936
| 1936  
|Stereophonc Phonograph Record
| Stereophonc Phonograph Record  
|Arthur C. Keller &amp; Irad S. Rafuse
| [[Oral-History:Arthur C. Keller|Arthur C. Keller]] &amp; Irad S. Rafuse
|-
|-
|1936
| 1936  
|Vocoder Speech Synthesis
| [[Vocoders and Voders|Vocoder Speech Synthesis]]
|Homer Dudley
| Homer Dudley
|-
|-
|1936
| 1936  
|Reed Switch
| Reed Switch  
|Walter B. Elwood
| Walter B. Elwood
|-
|-
|1936
| 1936  
|High-Efficiency AM-Transmit. Amp.
| High-Efficiency AM-Transmit. Amp.  
|Amp. William H. Doherty
| William H. Doherty
|-
|-
|1937
| 1937  
|Boolean Logic Relay Computer
| Boolean Logic Relay Computer  
|George Robert Stibitz &amp; S. B. Williams
| George Robert Stibitz &amp; S. B. Williams
|-
|-
|1937
| 1937  
|Velocity Modulation Diode
| Velocity Modulation Diode  
|Frederick B. Llewellyn
| [[Frederick Llewellyn|Frederick B. Llewellyn]]
|-
|-
|1937
| 1937  
|Isograph Analog Comp.for Poly. 0s
| Isograph Analog Comp.for Poly. 0s  
|R. L. Dietzold
| R. L. Dietzold
|-
|-
|1937-38
| 1937-38  
|Voder Speech Synthesizer
| Voder Speech Synthesizer  
|Homer Dudley
| Homer Dudley
|-
|-
|1938
| 1938  
|Crossbar Switching System
| Crossbar Switching System  
|Many contributors
| Many contributors
|-
|-
|1938
| 1938  
|Insertion Parameter Filter Design
| Insertion Parameter Filter Design  
|Sidney Darlington  
| [[Sidney Darlington|Sidney Darlington]]
|-
|-
|1938
| 1938  
|Phase-Gain Stability Criteria
| Phase-Gain Stability Criteria  
|Hendrik W. Bode
| [[Hendrik W. Bode|Hendrik W. Bode]]
|-
|-
|1939
| 1939  
|Complex Number Calculator
| Complex Number Calculator  
|George Robert Stibitz &amp; S. B. Williams
| George Robert Stibitz &amp; S. B. Williams
|-
|-
|1939
| 1939  
|P-N Junction
| P-N Junction  
|Russell Shoemaker Ohl
| [[Russell Ohl|Russell Shoemaker Ohl]]
|-
|-
|1939
| 1939  
|Smith Chart for Transmission Lines
| [[Smith Chart|Smith Chart for Transmission Lines]]
|Phillip H. Smith
| [[Philip Smith|Phillip H. Smith]]
|-
|-
|1940
| 1940  
|Pierce Electron Gun
| Pierce Electron Gun  
|John R. Pierce
| [[John Pierce|John R. Pierce]]
|-
|-
|1940s
| 1940s  
|Thermistor Materials
| Thermistor Materials  
|G. L. Pearson, J. A. Becker &amp; C. B. Green
| G. L. Pearson, J. A. Becker &amp; C. B. Green
|-
|-
|1940
| 1940  
|Reflex Klystron
| Reflex [[Klystron]]
|John R. Pierce &amp; W. G. Shepherd  
| [[John Pierce|John R. Pierce]] &amp; W. G. Shepherd
|-
|-
|1940
| 1940  
|Photovoltaic P-N Junction
| Photovoltaic P-N Junction  
|Russell Shoemaker Ohl
| [[Russell Ohl|Russell Shoemaker Ohl]]
|-
|-
|1941
| 1941  
|Sound Spectrograph
| Sound Spectrograph  
|W. Koenig, H. K. Dunn &amp; L. Y. Lacy
| W. Koenig, H. K. Dunn &amp; L. Y. Lacy
|-
|-
|1941
| 1941  
|Vocoder Speech Secrecy System
| Vocoder Speech Secrecy System  
|R. K. Potter &amp; R. C. Mathes
| R. K. Potter &amp; R. C. Mathes
|-
|-
|1942
| 1942  
|Acoustic Homing Torpedo
| Acoustic Homing Torpedo  
|Many contributors
| Many contributors
|-
|-
|1942
| 1942  
|Horn-Reflector Antenna
| Horn-Reflector Antenna  
|Harald T. Friis amp; Alfred C. Beck  
| [[Harald T. Friis]] amp; Alfred C. Beck
|-
|-
|1943
| 1943  
|Echo-Ranging Sonar
| Echo-Ranging Sonar  
|Many contributors
| Many contributors
|-
|-
|1943
| 1943  
|Microgel Synthetic Rubber
| Microgel Synthetic Rubber  
|William O. Baker &amp; C. S. Fuller  
| [[William O. Baker|William O. Baker]] &amp; C. S. Fuller
|-
|-
|1943
| 1943  
|Computer-Contr. M5 Gun Director
| Computer-Contr. M5 Gun Director  
|Many contributors
| Many contributors
|-
|-
|1944
| 1944  
|Close-Spaced Triode (Model 416)
| Close-Spaced Triode (Model 416)  
|Jack A. Morton
| Jack A. Morton
|-
|-
|1944
| 1944  
|Math.Treatment of Noise Theory
| Math.Treatment of Noise Theory  
|Stephen O. Rice
| [[Stephen Rice|Stephen O. Rice]]
|-
|-
|1940s
| 1940s  
|Microwave Radio Prop. Studies
| Microwave Radio Prop. Studies  
|A. B. Crawford &amp; collaborators  
| A. B. Crawford &amp; collaborators
|-
|-
|1945
| 1945  
|Pulse Code Modulation Paper
| [[Bell Utilizes PCM Multiplexing|Pulse Code Modulation Paper]]
|J. Pierce, C. Shannon &amp; B. Oliver
| [[John Pierce|J. Pierce]], [[Claude Shannon|C. Shannon]] &amp; [[Bernard Oliver|B. Oliver]]
|-
|-
|1945
| 1945  
|Nike Anti-Aircraft Missile Project
| Nike Anti-Aircraft Missile Project  
|Many conributors
| Many contributors
|-
|-
|1945
| 1945  
|“Dunking Brid” Amusement Dev.
| “Dunking Brid” Amusement Dev.  
|Miles V. Sullivan
| Miles V. Sullivan
|-
|-
|1945
| 1945  
|Travelling-Wave-Tube Analysis
| Travelling-Wave-Tube Analysis  
|John R. Pierce
| [[John Pierce|John R. Pierce]]
|-
|-
|1946
| 1946  
|L1 Coaxial Cable System
| L1 Coaxial Cable System  
|Many contributors
| Many contributors
|-
|-
|1946
| 1946  
|Junction Solar Cell Patent
| Junction Solar Cell Patent  
|Russell Shoemaker Ohl
| [[Russell Ohl|Russell Shoemaker Ohl]]
|-
|-
|1947
| 1947  
|The Bit
| The Bit  
|John W. Tukey
| [[John Tukey|John W. Tukey]]
|-
|-
|1947
| 1947  
|Point-Contact Transistor
| [[Bell Demonstrates Transistor|Point-Contact Transistor]]
|John Bardeen &amp; Walter H. Brattain
| [[John Bardeen|John Bardeen]] &amp; [[Walter H. Brattain|Walter H. Brattain]]
|-
|-
|1947
| 1947  
|Cellular Wireless Concept
| Cellular Wireless Concept  
|Donald H. Ring &amp; W. Rae Young
| Donald H. Ring &amp; W. Rae Young
|-
|-
|1947
| 1947  
|Helix Travelling Wave Tube
| Helix Travelling Wave Tube  
|John R. Pierce &amp; L. M. Field
| [[John Pierce|John R. Pierce]] &amp; L. M. Field
|-
|-
|1947
| 1947  
|Chirp Radar
| Chirp Radar  
|Sidney Darlington
| [[Sidney Darlington|Sidney Darlington]]
|-
|-
|1947
| 1947  
|TDX Microwave Radio System
| TDX Microwave Radio System  
|Harald T. Friis &amp; G. N. Thayer
| [[Harald T. Friis]] &amp; G. N. Thayer
|-
|-
|1948
| 1948  
|Information Theory
| [[Shannon Publishes on Communication Theory|Information Theory]]
|Claude Shannon
| [[Claude Shannon]]
|-
|-
|1948
| 1948  
|Error Correcting Codes
| Error Correcting Codes  
|Richard W. Hamming
| Richard W. Hamming
|-
|-
|1948
| 1948  
|Bipolar Junction Transistor
| Bipolar Junction Transistor  
|William Shockley
| [[William Shockley]]
|-
|-
|1949
| 1949  
|Time Assignment Speech Interp.
| Time Assignment Speech Interp.  
|Carl B. H. Feldman
| Carl B. H. Feldman
|-
|-
|1949
| 1949  
|Semicond.Particle Detectors
| Semicond.Particle Detectors  
|Kenneth G. Mckay
| Kenneth G. Mckay
|-
|-
|1949
| 1949  
|Gas Discharge Noise Tube
| Gas Discharge Noise Tube  
|W. W. Mumford
| W. W. Mumford
|-
|-
|1950
| 1950  
|TD Transcon. M-wave Rad. Sys.
| TD Transcon. M-wave Rad. Sys.  
|Many contributors
| Many contributors
|-
|-
|1950
| 1950  
|Spat. Harm. Trav. Wv. Tube Amp.
| Spat. Harm. Trav. Wv. Tube Amp.  
|Sidney Millman
| Sidney Millman
|-
|-
|1950
| 1950  
|Differential PCM of TV Signals
| Differential PCM of TV Signals  
|C. C. Cutler, C. W. Harrison &amp; B. M. Oliver
| [[C. Chapin Cutler|C. C. Cutler]], C. W. Harrison &amp; [[Bernard Oliver|B. M. Oliver]]
|-
|-
|1950
| 1950  
|Model of Basilar Membrane
| Model of Basilar Membrane  
|L. C. Peterson &amp; Bruce P. Bogert  
| L. C. Peterson &amp; Bruce P. Bogert
|-
|-
|1950
| 1950  
|High-Quality Synth,Qtz Growth
| High-Quality Synth,Qtz Growth  
|A. Walker, G. Kohman, E. Buehler &amp; R. Laudise
| A. Walker, G. Kohman, E. Buehler &amp; R. Laudise
|-
|-
|1950
| 1950  
|Trans. Line Model of Vocal Tract
| Trans. Line Model of Vocal Tract  
|H. K. Dunn  
| H. K. Dunn
|-
|-
|1951
| 1951  
|Zone Refining
| Zone Refining  
|William G. Pfann
| William G. Pfann
|-
|-
|1951
| 1951  
|Direct Distance Dialing
| Direct Distance Dialing  
|Many contributors
| Many contributors
|-
|-
|1951
| 1951  
|Polymer Carbon
| Polymer Carbon  
|W. O. Baker &amp; F. H. Winslow
| [[William O. Baker|W. O. Baker]] &amp; F. H. Winslow
|-
|-
|1951
| 1951  
|Epitaxial Deposition
| Epitaxial Deposition  
|Gordon Teal &amp; Howard Christensen
| [[Gordon Teal|Gordon Teal]] &amp; Howard Christensen
|-
|-
|1951
| 1951  
|Stochastic Service Arrival Traffic
| Stochastic Service Arrival Traffic  
|J. Riordan
| J. Riordan
|-
|-
|1952
| 1952  
|Ion Implantation
| Ion Implantation  
|R. S. Ohl &amp; William S. Shockley
| [[Russell Ohl|R. S. Ohl]] &amp; [[William Shockley|William S. Shockley]]
|-
|-
|1953
| 1953  
|Photo-Transistor
| Photo-Transistor  
|J. N. Shive
| J. N. Shive
|-
|-
|1953
| 1953  
|Reflected Binary Code
| Reflected [[Binary Numbers and Binary Math|Binary]] Code  
|Frank Gray
| Frank Gray
|-
|-
|1953
| 1953  
|Avalanche Photodiode Physics
| Avalanche Photodiode Physics  
|Kenneth G. McKay &amp; K. B. McAfee
| Kenneth G. McKay &amp; K. B. McAfee
|-
|-
|1954
| 1954  
|Photovoltaic Solar Cell
| Photovoltaic Solar Cell  
|D. Chapin, C. Souther Fuller &amp; G. Pearson
| D. Chapin, C. Souther Fuller &amp; G. Pearson
|-
|-
|1954
| 1954  
|Formant Vocoder
| Formant Vocoder  
|Eric S. Weibel
| Eric S. Weibel
|-
|-
|1954
| 1954  
|Coaxial Magnetron
| Coaxial Magnetron  
|Joseph Feinstein
| Joseph Feinstein
|-
|-
|1955
| 1955  
|Lin.Floating-Dec. Prog.Langs.
| Lin.Floating-Dec. Prog.Langs.  
|V. M. Wolontis &amp; Richard W. Hamming
| V. M. Wolontis &amp; Richard W. Hamming
|-
|-
|1955
| 1955  
|Directive Antenna Arrays
| Directive Antenna Arrays  
|E. N. Gilbert &amp; S. P. Morgan
| E. N. Gilbert &amp; S. P. Morgan
|-
|-
|1955
| 1955  
|Diffused Emit. &amp; Base Si Trans
| Diffused Emit. &amp; Base Si Trans  
|Morris Tannenbaum and D. E. Thomas  
| [[Oral-History:Morris_Tanenbaum|Morris Tanenbaum]] and D. E. Thomas
|-
|-
|1955
| 1955  
|Oxide Masking of Silicon Wafers
| Oxide Masking of Silicon Wafers  
|Carl J. Frosh &amp; Lincoln Derrick
| Carl J. Frosh &amp; Lincoln Derrick
|-
|-
|1955
| 1955  
|Pyrolytic C (Ablative HeatShield)
| Pyrolytic C (Ablative HeatShield)  
|F. H. Winslow &amp; William O. Baker
| F. H. Winslow &amp; [[William O. Baker|William O. Baker]]
|-
|-
|1956
| 1956  
|Polyethelene Cable Sheathing
| Polyethelene Cable Sheathing  
|W. Lincoln Hawkins
| W. Lincoln Hawkins
|-
|-
|1956
| 1956  
|P-I-N Photodiode Theory
| P-I-N Photodiode Theory  
|W. T. Read, Jr.
| W. T. Read, Jr.
|-
|-
|1956
| 1956  
|TAT-1
| [[Milestones:The First Submarine Transatlantic Telephone Cable System (TAT-1), 1956|TAT-1]]
|Many contributors
| Many contributors
|-
|-
|1957
| 1957  
|Supermendur Magnetic Alloy
| Supermendur Magnetic Alloy  
|H. L. B. Bould &amp; D. H. Wenny
| H. L. B. Bould &amp; D. H. Wenny
|-
|-
|1957
| 1957  
|Rare Earth Permanent Magnets
| Rare Earth Permanent Magnets  
|J. H. Wernick &amp; E. A. Nesbitt  
| J. H. Wernick &amp; E. A. Nesbitt
|-
|-
|1957
| 1957  
|Minimal Tree Algorithm
| Minimal Tree Algorithm  
|Robert C. Prim
| Robert C. Prim
|-
|-
|1957
| 1957  
|Computer Music
| [[Electronic and Computer Music|Computer Music]]
|Max V. Mathews
| [[Max Mathews|Max V. Mathews]]
|-
|-
|1957
| 1957  
|Info. Rate of Human Channel
| Info. Rate of Human Channel  
|John R. Pierce &amp; John E. Karlin
| [[John Pierce|John R. Pierce]] &amp; John E. Karlin
|-
|-
|1958
| 1958  
|Bell 101 Dataset Modem
| Bell 101 Dataset Modem  
|Many contributors
| Many contributors
|-
|-
|1958
| 1958  
|Laser
| [[Laser]]
|Arthur L. Schawlow &amp; Charles W. Townes
| [[Arthur L. Schawlow|Arthur L. Schawlow]] &amp; [[Charles Townes|Charles W. Townes]]
|-
|-
|1958
| 1958  
|Voice Excited Vocoder
| Voice Excited Vocoder  
|Manfred R. Schroeder
| [[Manfred R. Schroeder|Manfred R. Schroeder]]
|-
|-
|1958
| 1958  
|Theory of Random Systems
| Theory of Random Systems  
|Philip Warren Anderson
| Philip Warren Anderson
|-
|-
|1958
| 1958  
|KNa Niobate Ceramic Del. Ln.
| KNa Niobate Ceramic Del. Ln.  
|L. Egerton &amp; S. S. Flaschen
| L. Egerton &amp; [[Oral-History:Steward Flaschen|S. S. Flaschen]]
|-
|-
|1958
| 1958  
|Synthtic Quartz Crystal Growth
| Synthtic Quartz Crystal Growth  
|Robert A. Laudise &amp; Albert Ballman  
| Robert A. Laudise &amp; Albert Ballman
|-
|-
|1958
| 1958  
|A/D Conversion Syst. for Audio
| A/D Conversion Syst. for Audio  
|E. David, Jr., M. Mathews &amp; H. McDonald
| E. David, Jr., [[Max Mathews|M. Mathews]] &amp; H. McDonald
|-
|-
|1959
| 1959  
|Macro-Instruction Programming
| Macro-Instruction Programming  
|M. Douglas McIlroy &amp; Douglas E. Eastwood
| M. Douglas McIlroy &amp; Douglas E. Eastwood
|-
|-
|1959
| 1959  
|Nike Zeus Anti-Ballistic Missile
| Nike Zeus Anti-Ballistic Missile  
|Many contributors
| Many contributors
|-
|-
|1960
| 1960  
|BLODI Block Diagr. Compiler
| BLODI Block Diagr. Compiler  
|John Kelly, Vic Vyssotsky &amp; Carol Lochbaum
| John Kelly, Vic Vyssotsky &amp; Carol Lochbaum
|-
|-
|1960
| 1960  
|Echo Communications Satellite
| Echo Communications Satellite  
|John R. Pierce &amp; team
| [[John Pierce|John R. Pierce]] &amp; team
|-
|-
|1960
| 1960  
|Order-of-Arrival Service Model
| Order-of-Arrival Service Model  
|Vaclav E. Benes
| Vaclav E. Benes
|-
|-
|1960
| 1960  
|MOS Transistor
| [[CMOS|MOS Transistor]]
|John Atalla &amp; Dawon Kahng
| John Atalla &amp; Dawon Kahng
|-
|-
|1960
| 1960  
|High Mag. Field Superconduc.
| High Mag. Field [[Superconductors|Superconduc.]]
|J. Kunzler, F. Hsu, E. Buehler &amp; J. Wernick
| J. Kunzler, F. Hsu, E. Buehler &amp; J. Wernick
|-
|-
|1960
| 1960  
|Silicon Epitaxy
| Silicon Epitaxy  
|Henry C. Theuerer
| Henry C. Theuerer
|-
|-
|1960
| 1960  
|Helium-Neon Gas Laser
| Helium-Neon Gas Laser  
|A. Javan, W. R. Bennet &amp; D. R. Herriott  
| A. Javan, W. R. Bennet &amp; D. R. Herriott
|-
|-
|1960
| 1960  
|Space Saver Rotary Dial
| Space Saver Rotary Dial  
|Charles F. Matke  
| Charles F. Matke
|-
|-
|1960
| 1960  
|Superconduc. Nb-Sn Magnet
| Superconduc. Nb-Sn Magnet  
|John Eugene Kunzler
| John Eugene Kunzler
|-
|-
|1961
| 1961  
|T1 Digital Carrier Introduced
| T1 Digital Carrier Introduced  
|Many contributors
| Many contributors
|-
|-
|1961
| 1961  
|Theory of Optical Resonators
| Theory of Optical Resonators  
|A. G. Fox &amp; T. Li
| A. G. Fox &amp; T. Li
|-
|-
|1962
| 1962  
|Cepstrum Pitch Detection
| Cepstrum Pitch Detection  
|Manfred R. Schroeder & A. Michael Noll
| [[Manfred R. Schroeder|Manfred R. Schroeder]] &amp; [[A. Michael Noll]]
|-
|-
|1962
| 1962  
|Telstar Active Satellite Launch
| [[NASA Launches Telstar|Telstar Active Satellite Launch]]
|John R. Pierce &amp; Eugene O’Neil’s team  
| [[John Pierce|John R. Pierce]] &amp; [[Oral-History:Eugene O'Neill|Eugene O’Neil’s]] team
|-
|-
|1962
| 1962  
|Electret Microphone
| Electret Microphone  
|Gerhard Sessler &amp; James E. West
| Gerhard Sessler &amp; James E. West
|-
|-
|1962
| 1962  
|Adaptive Echo Canceller
| Adaptive Echo Canceller  
|J. Kelly, B. Logan, M. Sondhi &amp; A. Presti
| J. Kelly, B. Logan, M. Sondhi &amp; A. Presti
|-
|-
|1962
| 1962  
|Electronic Artificial Larynx
| Electronic Artificial Larynx  
|H. L. Barney, F. E. Haworth &amp; H. K. Dunn
| H. L. Barney, F. E. Haworth &amp; H. K. Dunn
|-
|-
|1962
| 1962  
|Basilar-Membrane Displace.
| Basilar-Membrane Displace.  
|James L. Flanagan
| [[James L. Flanagan|James L. Flanagan]]
|-
|-
|1962
| 1962  
|Vocal-Tract Speech Synthesis
| Vocal-Tract Speech Synthesis  
|John L. Kelly, Jr. &amp; Carol Lochbaum  
| John L. Kelly, Jr. &amp; Carol Lochbaum
|-
|-
|1962
| 1962  
|Digital Computer Art
| Digital Computer Art  
|A. Michael Noll
| [[A. Michael Noll]]
|-
|-
|1962
| 1962  
|Grating-Type Delay Line
| Grating-Type Delay Line  
|R. S. Duncan &amp; Marsena R. Parker
| R. S. Duncan &amp; Marsena R. Parker
|-
|-
|1962
| 1962  
|Red Helium-Neon Laser
| Red Helium-Neon Laser  
|Alan White &amp; J. Dane Rigden
| Alan White &amp; J. Dane Rigden
|-
|-
|1962-68
| 1962-68  
|Nonmetric Mutltid.Scaling
| Nonmetric Mutltid.Scaling  
|R. Shepard, J. Kruskal &amp; Newman Guttman
| R. Shepard, J. Kruskal &amp; Newman Guttman
|-
|-
|1963
| 1963  
|Digital Filter Design
| Digital Filter Design  
|James F. Kaiser &amp; Roger M. Golden
| [[Oral-History:James Kaiser|James F. Kaiser]] &amp; Roger M. Golden
|-
|-
|1963
| 1963  
|Touchtone Dialing
| Touchtone Dialing  
|Leo Schenker
| Leo Schenker
|-
|-
|1963
| 1963  
|Chemiluminescence
| Chemiluminescence  
|Edwin A. Chandross
| Edwin A. Chandross
|-
|-
|1963
| 1963  
|BEFLIX
| BEFLIX  
|Kenneth C. Knowlton
| Kenneth C. Knowlton
|-
|-
|1963
| 1963  
|Thin-Film Delay Line
| Thin-Film Delay Line  
|Norman F. Foster
| Norman F. Foster
|-
|-
|1963
| 1963  
|ALPAK
| ALPAK  
|W. Stanley, B. A. Tague &amp; J. P. Hyde  
| W. Stanley, B. A. Tague &amp; J. P. Hyde
|-
|-
|1960s
| 1960s  
|Comp. Animation apps.  
| Comp. Animation apps.  
|Many contributors
| Many contributors
|-
|-
|1964
| 1964  
|Detect “Big-Bang” Radiation
| Detect “Big-Bang” Radiation  
|Arno A. Penzias &amp; Robert W. Wilson
| [[Arno Allan Penzias|Arno A. Penzias]] &amp; [[Robert Wilson|Robert W. Wilson]]
|-
|-
|1964
| 1964  
|Adaptive Equalizer Modem
| Adaptive Equalizer Modem  
|Robert W. Lucky
| [[Robert W. Lucky|Robert W. Lucky]]
|-
|-
|1964
| 1964  
|CO2 High-Power Laser
| CO2 High-Power Laser  
|C. Kumar N. Patel
| [[C. Kumar Patel|C. Kumar N. Patel]]
|-
|-
|1964
| 1964  
|YAG Laser
| YAG Laser  
|J. E. Geusic, H. M. Marcos &amp; L. G. Van Uitert
| J. E. Geusic, H. M. Marcos &amp; L. G. Van Uitert
|-
|-
|1964
| 1964  
|Argon Laser Retina Repair
| Argon Laser Retina Repair  
|Eugene I. Gordon &amp; Edward F. Labuda
| [[Oral-History:Eugene Gordon|Eugene I. Gordon]] &amp; Edward F. Labuda
|-
|-
|1964
| 1964  
|Van Allen belt detection
| Van Allen belt detection  
|W. Brown, L. Lanzerotti &amp; L. Medford
| W. Brown, L. Lanzerotti &amp; L. Medford
|-
|-
|1964
| 1964  
|MULTICS Time-Share Comp.
| MULTICS Time-Share Comp.  
|Many contributors
| Many contributors
|-
|-
|1960s
| 1960s  
|Random-Dot &amp; Self Stereo.
| Random-Dot &amp; Self Stereo.  
|Bela Julesz
| Bela Julesz
|-
|-
|1965
| 1965  
|Stereoscopic Comp. Anim.
| Stereoscopic Comp. Anim.  
|A. Michael Noll
| [[A. Michael Noll]]
|-
|-
|1965
| 1965  
|#1 Electronic Switching Sys.
| #1 Electronic Switching Sys.  
|Many contributors
| Many contributors
|-
|-
|1965
| 1965  
|FFT
| FFT  
|John Tukey &amp; J. W. Cooley (IBM)
| [[John Tukey|John Tukey]] &amp; [[James W. Cooley|J. W. Cooley]] (IBM)
|-
|-
|1965
| 1965  
|Ded. Lab. Interactive Comp.
| Ded. Lab. Interactive Comp.  
|Peter B. Denes
| Peter B. Denes
|-
|-
|1965
| 1965  
|Remote GDT
| Remote GDT  
|William H. Ninke
| William H. Ninke
|-
|-
|1966
| 1966  
|List-Processing Comp. Lang.
| List-Processing Comp. Lang.  
|Kenneth C. Knowlton
| Kenneth C. Knowlton
|-
|-
|1966
| 1966  
|Comp.-Aided Lib. Distribution
| Comp.-Aided Lib. Distribution  
|W. Stanley Brown &amp; Joseph F. Traub  
| W. Stanley Brown &amp; Joseph F. Traub
|-
|-
|1966
| 1966  
|Silicon Gate
| Silicon Gate  
|R. E. Kerwin, D. L. Klein &amp; J. C. Sarace
| R. E. Kerwin, D. L. Klein &amp; J. C. Sarace
|-
|-
|1967
| 1967  
|Linear Predictive Coding
| Linear Predictive Coding  
|Bishnu S. Atal &amp; Manfred R. Schroeder  
| Bishnu S. Atal &amp; [[Manfred R. Schroeder|Manfred R. Schroeder]]
|-
|-
|1967
| 1967  
|Magn.Bubble Memory Devs
| Magn.Bubble Memory Devs  
|A. H. Bobeck, H. E. D. Scovil &amp; P. Michaelis  
| A. H. Bobeck, H. E. D. Scovil &amp; P. Michaelis
|-
|-
|1967
| 1967  
|Ion Implantation Implem.
| Ion Implantation Implem.  
|Alfred U. Mac Rae &amp; Walter L. Brown  
| Alfred U. Mac Rae &amp; [[Walter L. Brown|Walter L. Brown]]
|-
|-
|1968
| 1968  
|Interactive 3D Input &amp; Displ.
| Interactive 3D Input &amp; Displ.  
|A. Michael Noll
| [[A. Michael Noll]]
|-
|-
|1968
| 1968  
|Speech Synthesis by Rule
| Speech Synthesis by Rule  
|Cecil H. Coker
| Cecil H. Coker
|-
|-
|1968
| 1968  
|Heterostructure Semic.Laser
| Heterostructure Semic.Laser  
|I. Hayashi &amp; M. Panish
| I. Hayashi &amp; M. Panish
|-
|-
|1968
| 1968  
|Molecular Beam Epitaxy
| Molecular Beam Epitaxy  
|John R. Arthur &amp; A. Y. Cho
| John R. Arthur &amp; [[Alfred Y. Cho|A. Y. Cho]]
|-
|-
|1968
| 1968  
|LED for Optical Fibers
| LED for Optical Fibers  
|C. A. Burrus
| [[Charles Sidney Burrus|C. A. Burrus]]
|-
|-
|1969
| 1969  
|UNIX™ Operating System
| UNIX™ Operating System  
|Many contributors
| Many contributors
|-
|-
|1969
| 1969  
|Charge Coupled Device
| Charge Coupled Device  
|William Boyle &amp; George E. Smith  
| William Boyle &amp; [[Oral-History:George E. Smith|George E. Smith]]
|-
|-
|1969
| 1969  
|Virtual Circ. Switch. (Spider)
| Virtual Circ. Switch. (Spider)  
|Alexander G. Fraser
| Alexander G. Fraser
|-
|-
|1969
| 1969  
|Strip Hologram
| Strip Hologram  
|Michael C. King
| Michael C. King
|-
|-
|1969
| 1969  
|Scanned-Display Raster
| Scanned-Display Raster  
|A. Michael Noll
| [[A. Michael Noll]]
|-
|-
|1970
| 1970  
|Cell. Wless. Handoff Syst.
| Cell. Wless. Handoff Syst.  
||A. Joel, Jr., R. Frenkiel, &amp; P. Porter
| [[Amos E. Joel, Jr.|A. Joel, Jr.]], [[Richard H. Frenkiel|R. Frenkiel]], &amp; P. Porter
|-
|-
|1970
| 1970  
|Adaptive Delta Modulation
| Adaptive Delta Modulation  
|N. S. Jayant
| N. S. Jayant
|-
|-
|1970
| 1970  
|Cyl. Pb-Acid Central-Off. Bat.
| Cyl. Pb-Acid Central-Off. Bat.  
|D. Koontz, D. Feder, L. Babusci &amp; H. Leur
| D. Koontz, D. Feder, L. Babusci &amp; H. Leur
|-
|-
|1970
| 1970  
|Tact. Force-Fdbk. Haptic Sys.
| Tact. Force-Fdbk. Haptic Sys.  
|A. Michael Noll
| [[A. Michael Noll]]
|-
|-
|1970
| 1970  
|Ind. Diff. Multidim. Scaling
| Ind. Diff. Multidim. Scaling  
|J. Douglas Carroll &amp; J. J. Chang
| J. Douglas Carroll &amp; J. J. Chang
|-
|-
|1970
| 1970  
|Graded-Index Optical Fiber
| Graded-Index Optical Fiber  
|Many contributors
| Many contributors
|-
|-
|1972
| 1972  
|Lightwave Repeater
| Lightwave Repeater  
|J. E. Goell, P. K. Runge
| J. E. Goell, P. K. Runge
|-
|-
|1972
| 1972  
|Data Ring
| Data Ring  
|John R. Pierce &amp; Cecil H. Coker  
| [[John Pierce|John R. Pierce]] &amp; Cecil H. Coker
|-
|-
|1972
| 1972  
|Thin-Film Magn.-Optic Swit.
| Thin-Film Magn.-Optic Swit.  
|Many contributors
| Many contributors
|-
|-
|1973
| 1973  
|Cellular Switching Plan  
| Cellular Switching Plan  
|Z.Fluhr &amp; Eric Nussbaum
| Z.Fluhr &amp; Eric Nussbaum
|-
|-
|1973
| 1973  
|Adaptive Quant. Diff. PCM
| Adaptive Quant. Diff. PCM  
|James L. Flanagan, P. Cummiskey &amp; N. S. Jayant
| [[James L. Flanagan|James L. Flanagan]], P. Cummiskey &amp; N. S. Jayant
|-
|-
|1973
| 1973  
|C Programming Language
| C Programming Language  
|Dennis M. Ritchie
| [[Dennis Ritchie|Dennis M. Ritchie]]
|-
|-
|1974
| 1974  
|Electronic Blackboard
| Electronic Blackboard  
|O. Gabe Torok
| O. Gabe Torok
|-
|-
|1974
| 1974  
|Transvers. Dig.Filter Des.
| Transvers. Dig.Filter Des.  
|Lawrence R. Rabiner
| [[Oral-History:Lawrence Rabiner|Lawrence R. Rabiner]]
|-
|-
|1974
| 1974  
|Comput. Tomography Alg.
| Comput. Tomography Alg.  
|L. A. Shepp &amp; B. F. Logan
| L. A. Shepp &amp; B. F. Logan
|-
|-
|1974
| 1974  
|Dig. Wire Ctr &amp; Sm. Dig.Switch
| Dig. Wire Ctr &amp; Sm. Dig.Switch  
|Hank McDonald, Joseph Condon, &amp; H. Alles
| Hank McDonald, Joseph Condon, &amp; H. Alles
|-
|-
|1975
| 1975  
|Single-Mode Laser
| Single-Mode Laser  
|T. P. Lee, C. A. Burrus, B. I. Miller &amp; R. A. Logan
| T. P. Lee, [[Charles Sidney Burrus|C. A. Burrus]], B. I. Miller &amp; R. A. Logan
|-
|-
|1976
| 1976  
|No.4 ESS Dig. Switch. Sys.
| No.4 ESS Dig. Switch. Sys.  
|Many contributors
| Many contributors
|-
|-
|1976
| 1976  
|Video-Teleconf. Svc  
| Video-Teleconf. Svc  
|Joseph J. Horzepa &amp; team
| Joseph J. Horzepa &amp; team
|-
|-
|1976
| 1976  
|CCIS
| CCIS  
|Many contributors
| Many contributors
|-
|-
|1977
| 1977  
|Comm. Optical-Fiber Trans.
| Comm. Optical-Fiber Trans.  
|Many contributors
| Many contributors
|-
|-
|1977
| 1977  
|Belle Ded.Chess Computer
| Belle Ded.Chess Computer  
|Joseph H. Condon &amp; Kenneth L. Thompson
| Joseph H. Condon &amp; Kenneth L. Thompson
|-
|-
|1977
| 1977  
|Thry.of Disor. States of Mat.
| Thry.of Disor. States of Mat.  
|Philip W. Anderson
| Philip W. Anderson
|-
|-
|1977
| 1977  
|Hematofluorometer
| Hematofluorometer  
|Many contributors
| Many contributors
|-
|-
|1978
| 1978  
|L5E Coaxial Cable System
| L5E Coaxial Cable System  
|Many contributors
| Many contributors
|-
|-
|1978
| 1978  
|Tele. Modular Plug &amp;
| Tele. Modular Plug &amp;  
|Jack Charles L. Krumreich
| Jack Charles L. Krumreich
|-
|-
|1978
| 1978  
|32-bit Microprocessor
| 32-bit Microprocessor  
|L.Thomas, B. Murphy &amp; Alfred U. Mac Rae
| L.Thomas, B. Murphy &amp; Alfred U. Mac Rae
|-
|-
|1978
| 1978  
|XDS
| XDS  
|H. G. Alles, C. Christensen, R. W. Lucky
| H. G. Alles, C. Christensen, [[Robert W. Lucky|R. W. Lucky]]
|-
|-
|1978
| 1978  
|800 service
| 800 service  
|Roy P. Weber
| Roy P. Weber
|-
|-
|1979
| 1979  
|Psychoacoustic Mask. Cod.
| Psychoacoustic Mask. Cod.  
|M. Schroeder, Bishu S. Atal &amp; Joseph L. Hall
| [[Manfred R. Schroeder|M. Schroeder]], Bishu S. Atal &amp; Joseph L. Hall
|-
|-
|1979
| 1979  
|Single-Chip DSP
| Single-Chip DSP  
|Many contributors
| Many contributors
|-
|-
|1980
| 1980  
|Heterojuction Phototrans.
| Heterojuction Phototrans.  
|J.A. Copeland, J. C. Campbell
| J.A. Copeland, J. C. Campbell
|-
|-
|1980
| 1980  
|Dyn. Non-Hier. Ntwk. Rout.
| Dyn. Non-Hier. Ntwk. Rout.  
|Gerald R. Ash &amp; Richard H. Cartwell
| Gerald R. Ash &amp; Richard H. Cartwell
|-
|-
|1981
| 1981  
|AR6A SSB-SC M-wave Syst.
| AR6A SSB-SC M-wave Syst.  
|Many contributors
| Many contributors
|-
|-
|1982
| 1982  
|5ESS® Dig.Switch. Syst.
| 5ESS® Dig.Switch. Syst.  
|Many contributors
| Many contributors
|-
|-
|1982
| 1982  
|Fractional Quant. Hall Effect
| Fractional Quant. Hall Effect  
|Horst Störmer, Daniel Tsui &amp; Robert Laughlin
| Horst Störmer, Daniel Tsui &amp; Robert Laughlin
|-
|-
|1983
| 1983  
|Hidden Markov Chain SR
| Hidden Markov Chain SR  
|B-H Juang, S. Levinson, L. Rabiner, &amp; M. Sondhi
| B-H Juang, S. Levinson, [[Oral-History:Lawrence Rabiner|L. Rabiner]], &amp; M. Sondhi
|-
|-
|1983
| 1983  
|Twin-Tub VLSI CMOS
| Twin-Tub VLSI CMOS  
|Louis C. Parrillo &amp; Richard S. Payne  
| Louis C. Parrillo &amp; Richard S. Payne
|-
|-
|1983
| 1983  
|Code-Excited LPC
| Code-Excited LPC  
|Manfred R. Schroeder &amp; Bishnu S. Atal  
| [[Manfred R. Schroeder|Manfred R. Schroeder]] &amp; Bishnu S. Atal
|}
|}


Revision as of 19:15, 17 May 2012

The first iteration of this list was compiled by Bell Labs alumnus A. Michael Noll in May 2012. 

(original list)

Original Notes:

  • Compiled by A. Michael Noll (with personal knowledge and an admitted bias toward speech research and computer graphics) and with sagacious comments from several Bell Telephone Laboratories colleagues.
  • Bell Telephone Laboratories, Inc. (BTL) was formed in 1925 and existed until the breakup of the Bell System on January 1, 1984. Only this period of nearly six decades is included here.
  • Innovations and discoveries were chosen to be significant new directions and not just incremental advances. However, a few “fascinating” ones, such as the “dunking bird,” have been included.
  • Tens of thousands of engineers, scientists, technicians, and others worked at Bell Telephone Laboratories, and all contributed in their own way to the overall accomplishments of the organization. Only a small few are listed here though.
  • On many of the larger development projects and systems, large engineering teams were involved, and accordingly individuals are not named.
Year Innovation or Discovery Innovators
1925 Electrical Sound Recording Joseph Maxfield & Harry Harrison
1925 Quality Control Theory W. A. Shewhart
1926 Thermal Noise John B. Johnson
1926 Antenna Arrays R. M. Foster
1926 Permendur Magnetic Alloy G. W. Elmen
1927 Negative Feedback Amplification Harold Black
1927 Television Transmission Herbert E. Ives
1927 Quartz Electronic Clock Warren Marrison
1927 Transatlantic Telephone Service Many contributors
1927 Wave Nature of the Electron Clinton J. Davisson & Lester. H. Germer
1927 Wearable Electronic Hearing Aid Harvey Fletcher
1927 Telephone Trunking Traffic Analysis Edward C. Molina
1928 Sampling Theorem Harry Nyquist
1929 Artificial Larynx Robert R. Riesz
1929 Broadband Coaxial Cable Lloyd Espenschied & Herbert A. Apfel
1929 Ship-to-Shore Radio System Many contributors
1929 Frequency Interleaving of TV Signal Frank Gray & John R. Hefele
1930 Moving-Coil Microphone E. C. Wente & A. L. Thuras
1930 Negative Impedance Repeater George Crisson
1931 Radio Astronomy Karl Jansky
1931 Rhombic Antenna Harald T. Friis & E. Bruce
1931 TWX Exchange Teletypewriter Svc Many contributors
1931 Stereophonic Recording on Film Harvey Fletcher
1931-32 Stereophonic Sound Rec. (45°) Harvey Fletcher, Arthur C. Keller
1932 Stability Criteria Diagrams Harry Nyquist
1932 Waveguide Experiments &Theory G. Southworth, A. King, A. E. Bowen
1933 Equal-Loudness Contours Harvey Fletcher & Wilden A. Munson
1933 Vitamin B1 Isolation Process Robert R. Williams
1933 Stereophonic Sound Transmission Harvey Fletcher
1934 Raster Scan TV System Pierre Mertz & Frank Gray
1936 Stereophonc Phonograph Record Arthur C. Keller & Irad S. Rafuse
1936 Vocoder Speech Synthesis Homer Dudley
1936 Reed Switch Walter B. Elwood
1936 High-Efficiency AM-Transmit. Amp. William H. Doherty
1937 Boolean Logic Relay Computer George Robert Stibitz & S. B. Williams
1937 Velocity Modulation Diode Frederick B. Llewellyn
1937 Isograph Analog Comp.for Poly. 0s R. L. Dietzold
1937-38 Voder Speech Synthesizer Homer Dudley
1938 Crossbar Switching System Many contributors
1938 Insertion Parameter Filter Design Sidney Darlington
1938 Phase-Gain Stability Criteria Hendrik W. Bode
1939 Complex Number Calculator George Robert Stibitz & S. B. Williams
1939 P-N Junction Russell Shoemaker Ohl
1939 Smith Chart for Transmission Lines Phillip H. Smith
1940 Pierce Electron Gun John R. Pierce
1940s Thermistor Materials G. L. Pearson, J. A. Becker & C. B. Green
1940 Reflex Klystron John R. Pierce & W. G. Shepherd
1940 Photovoltaic P-N Junction Russell Shoemaker Ohl
1941 Sound Spectrograph W. Koenig, H. K. Dunn & L. Y. Lacy
1941 Vocoder Speech Secrecy System R. K. Potter & R. C. Mathes
1942 Acoustic Homing Torpedo Many contributors
1942 Horn-Reflector Antenna Harald T. Friis amp; Alfred C. Beck
1943 Echo-Ranging Sonar Many contributors
1943 Microgel Synthetic Rubber William O. Baker & C. S. Fuller
1943 Computer-Contr. M5 Gun Director Many contributors
1944 Close-Spaced Triode (Model 416) Jack A. Morton
1944 Math.Treatment of Noise Theory Stephen O. Rice
1940s Microwave Radio Prop. Studies A. B. Crawford & collaborators
1945 Pulse Code Modulation Paper J. Pierce, C. Shannon & B. Oliver
1945 Nike Anti-Aircraft Missile Project Many contributors
1945 “Dunking Brid” Amusement Dev. Miles V. Sullivan
1945 Travelling-Wave-Tube Analysis John R. Pierce
1946 L1 Coaxial Cable System Many contributors
1946 Junction Solar Cell Patent Russell Shoemaker Ohl
1947 The Bit John W. Tukey
1947 Point-Contact Transistor John Bardeen & Walter H. Brattain
1947 Cellular Wireless Concept Donald H. Ring & W. Rae Young
1947 Helix Travelling Wave Tube John R. Pierce & L. M. Field
1947 Chirp Radar Sidney Darlington
1947 TDX Microwave Radio System Harald T. Friis & G. N. Thayer
1948 Information Theory Claude Shannon
1948 Error Correcting Codes Richard W. Hamming
1948 Bipolar Junction Transistor William Shockley
1949 Time Assignment Speech Interp. Carl B. H. Feldman
1949 Semicond.Particle Detectors Kenneth G. Mckay
1949 Gas Discharge Noise Tube W. W. Mumford
1950 TD Transcon. M-wave Rad. Sys. Many contributors
1950 Spat. Harm. Trav. Wv. Tube Amp. Sidney Millman
1950 Differential PCM of TV Signals C. C. Cutler, C. W. Harrison & B. M. Oliver
1950 Model of Basilar Membrane L. C. Peterson & Bruce P. Bogert
1950 High-Quality Synth,Qtz Growth A. Walker, G. Kohman, E. Buehler & R. Laudise
1950 Trans. Line Model of Vocal Tract H. K. Dunn
1951 Zone Refining William G. Pfann
1951 Direct Distance Dialing Many contributors
1951 Polymer Carbon W. O. Baker & F. H. Winslow
1951 Epitaxial Deposition Gordon Teal & Howard Christensen
1951 Stochastic Service Arrival Traffic J. Riordan
1952 Ion Implantation R. S. Ohl & William S. Shockley
1953 Photo-Transistor J. N. Shive
1953 Reflected Binary Code Frank Gray
1953 Avalanche Photodiode Physics Kenneth G. McKay & K. B. McAfee
1954 Photovoltaic Solar Cell D. Chapin, C. Souther Fuller & G. Pearson
1954 Formant Vocoder Eric S. Weibel
1954 Coaxial Magnetron Joseph Feinstein
1955 Lin.Floating-Dec. Prog.Langs. V. M. Wolontis & Richard W. Hamming
1955 Directive Antenna Arrays E. N. Gilbert & S. P. Morgan
1955 Diffused Emit. & Base Si Trans Morris Tanenbaum and D. E. Thomas
1955 Oxide Masking of Silicon Wafers Carl J. Frosh & Lincoln Derrick
1955 Pyrolytic C (Ablative HeatShield) F. H. Winslow & William O. Baker
1956 Polyethelene Cable Sheathing W. Lincoln Hawkins
1956 P-I-N Photodiode Theory W. T. Read, Jr.
1956 TAT-1 Many contributors
1957 Supermendur Magnetic Alloy H. L. B. Bould & D. H. Wenny
1957 Rare Earth Permanent Magnets J. H. Wernick & E. A. Nesbitt
1957 Minimal Tree Algorithm Robert C. Prim
1957 Computer Music Max V. Mathews
1957 Info. Rate of Human Channel John R. Pierce & John E. Karlin
1958 Bell 101 Dataset Modem Many contributors
1958 Laser Arthur L. Schawlow & Charles W. Townes
1958 Voice Excited Vocoder Manfred R. Schroeder
1958 Theory of Random Systems Philip Warren Anderson
1958 KNa Niobate Ceramic Del. Ln. L. Egerton & S. S. Flaschen
1958 Synthtic Quartz Crystal Growth Robert A. Laudise & Albert Ballman
1958 A/D Conversion Syst. for Audio E. David, Jr., M. Mathews & H. McDonald
1959 Macro-Instruction Programming M. Douglas McIlroy & Douglas E. Eastwood
1959 Nike Zeus Anti-Ballistic Missile Many contributors
1960 BLODI Block Diagr. Compiler John Kelly, Vic Vyssotsky & Carol Lochbaum
1960 Echo Communications Satellite John R. Pierce & team
1960 Order-of-Arrival Service Model Vaclav E. Benes
1960 MOS Transistor John Atalla & Dawon Kahng
1960 High Mag. Field Superconduc. J. Kunzler, F. Hsu, E. Buehler & J. Wernick
1960 Silicon Epitaxy Henry C. Theuerer
1960 Helium-Neon Gas Laser A. Javan, W. R. Bennet & D. R. Herriott
1960 Space Saver Rotary Dial Charles F. Matke
1960 Superconduc. Nb-Sn Magnet John Eugene Kunzler
1961 T1 Digital Carrier Introduced Many contributors
1961 Theory of Optical Resonators A. G. Fox & T. Li
1962 Cepstrum Pitch Detection Manfred R. Schroeder & A. Michael Noll
1962 Telstar Active Satellite Launch John R. Pierce & Eugene O’Neil’s team
1962 Electret Microphone Gerhard Sessler & James E. West
1962 Adaptive Echo Canceller J. Kelly, B. Logan, M. Sondhi & A. Presti
1962 Electronic Artificial Larynx H. L. Barney, F. E. Haworth & H. K. Dunn
1962 Basilar-Membrane Displace. James L. Flanagan
1962 Vocal-Tract Speech Synthesis John L. Kelly, Jr. & Carol Lochbaum
1962 Digital Computer Art A. Michael Noll
1962 Grating-Type Delay Line R. S. Duncan & Marsena R. Parker
1962 Red Helium-Neon Laser Alan White & J. Dane Rigden
1962-68 Nonmetric Mutltid.Scaling R. Shepard, J. Kruskal & Newman Guttman
1963 Digital Filter Design James F. Kaiser & Roger M. Golden
1963 Touchtone Dialing Leo Schenker
1963 Chemiluminescence Edwin A. Chandross
1963 BEFLIX Kenneth C. Knowlton
1963 Thin-Film Delay Line Norman F. Foster
1963 ALPAK W. Stanley, B. A. Tague & J. P. Hyde
1960s Comp. Animation apps. Many contributors
1964 Detect “Big-Bang” Radiation Arno A. Penzias & Robert W. Wilson
1964 Adaptive Equalizer Modem Robert W. Lucky
1964 CO2 High-Power Laser C. Kumar N. Patel
1964 YAG Laser J. E. Geusic, H. M. Marcos & L. G. Van Uitert
1964 Argon Laser Retina Repair Eugene I. Gordon & Edward F. Labuda
1964 Van Allen belt detection W. Brown, L. Lanzerotti & L. Medford
1964 MULTICS Time-Share Comp. Many contributors
1960s Random-Dot & Self Stereo. Bela Julesz
1965 Stereoscopic Comp. Anim. A. Michael Noll
1965 #1 Electronic Switching Sys. Many contributors
1965 FFT John Tukey & J. W. Cooley (IBM)
1965 Ded. Lab. Interactive Comp. Peter B. Denes
1965 Remote GDT William H. Ninke
1966 List-Processing Comp. Lang. Kenneth C. Knowlton
1966 Comp.-Aided Lib. Distribution W. Stanley Brown & Joseph F. Traub
1966 Silicon Gate R. E. Kerwin, D. L. Klein & J. C. Sarace
1967 Linear Predictive Coding Bishnu S. Atal & Manfred R. Schroeder
1967 Magn.Bubble Memory Devs A. H. Bobeck, H. E. D. Scovil & P. Michaelis
1967 Ion Implantation Implem. Alfred U. Mac Rae & Walter L. Brown
1968 Interactive 3D Input & Displ. A. Michael Noll
1968 Speech Synthesis by Rule Cecil H. Coker
1968 Heterostructure Semic.Laser I. Hayashi & M. Panish
1968 Molecular Beam Epitaxy John R. Arthur & A. Y. Cho
1968 LED for Optical Fibers C. A. Burrus
1969 UNIX™ Operating System Many contributors
1969 Charge Coupled Device William Boyle & George E. Smith
1969 Virtual Circ. Switch. (Spider) Alexander G. Fraser
1969 Strip Hologram Michael C. King
1969 Scanned-Display Raster A. Michael Noll
1970 Cell. Wless. Handoff Syst. A. Joel, Jr., R. Frenkiel, & P. Porter
1970 Adaptive Delta Modulation N. S. Jayant
1970 Cyl. Pb-Acid Central-Off. Bat. D. Koontz, D. Feder, L. Babusci & H. Leur
1970 Tact. Force-Fdbk. Haptic Sys. A. Michael Noll
1970 Ind. Diff. Multidim. Scaling J. Douglas Carroll & J. J. Chang
1970 Graded-Index Optical Fiber Many contributors
1972 Lightwave Repeater J. E. Goell, P. K. Runge
1972 Data Ring John R. Pierce & Cecil H. Coker
1972 Thin-Film Magn.-Optic Swit. Many contributors
1973 Cellular Switching Plan Z.Fluhr & Eric Nussbaum
1973 Adaptive Quant. Diff. PCM James L. Flanagan, P. Cummiskey & N. S. Jayant
1973 C Programming Language Dennis M. Ritchie
1974 Electronic Blackboard O. Gabe Torok
1974 Transvers. Dig.Filter Des. Lawrence R. Rabiner
1974 Comput. Tomography Alg. L. A. Shepp & B. F. Logan
1974 Dig. Wire Ctr & Sm. Dig.Switch Hank McDonald, Joseph Condon, & H. Alles
1975 Single-Mode Laser T. P. Lee, C. A. Burrus, B. I. Miller & R. A. Logan
1976 No.4 ESS Dig. Switch. Sys. Many contributors
1976 Video-Teleconf. Svc Joseph J. Horzepa & team
1976 CCIS Many contributors
1977 Comm. Optical-Fiber Trans. Many contributors
1977 Belle Ded.Chess Computer Joseph H. Condon & Kenneth L. Thompson
1977 Thry.of Disor. States of Mat. Philip W. Anderson
1977 Hematofluorometer Many contributors
1978 L5E Coaxial Cable System Many contributors
1978 Tele. Modular Plug & Jack Charles L. Krumreich
1978 32-bit Microprocessor L.Thomas, B. Murphy & Alfred U. Mac Rae
1978 XDS H. G. Alles, C. Christensen, R. W. Lucky
1978 800 service Roy P. Weber
1979 Psychoacoustic Mask. Cod. M. Schroeder, Bishu S. Atal & Joseph L. Hall
1979 Single-Chip DSP Many contributors
1980 Heterojuction Phototrans. J.A. Copeland, J. C. Campbell
1980 Dyn. Non-Hier. Ntwk. Rout. Gerald R. Ash & Richard H. Cartwell
1981 AR6A SSB-SC M-wave Syst. Many contributors
1982 5ESS® Dig.Switch. Syst. Many contributors
1982 Fractional Quant. Hall Effect Horst Störmer, Daniel Tsui & Robert Laughlin
1983 Hidden Markov Chain SR B-H Juang, S. Levinson, L. Rabiner, & M. Sondhi
1983 Twin-Tub VLSI CMOS Louis C. Parrillo & Richard S. Payne
1983 Code-Excited LPC Manfred R. Schroeder & Bishnu S. Atal

Sources: Impact, M. D. Fagen (Editor), 1971; A History of Engineering & Science in the BellSystem – Communications Sciences (1925-1980), S. Millman (Editor), 1984; A History of Engineering & Science in the Bell System – Physical Sciences (1925-1980), S. Millman (Editor), 1983.

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