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Category:Optical communication equipment

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A 1880 drawing of a photophone receiver and headset
A 1880 drawing of a photophone receiver and headset

Any device which transmits information through the use of light

Pages in category "Optical communication equipment"

The following 3 pages are in this category, out of 3 total.

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Media in category "Optical communication equipment"

This category contains only the following file.