Antique circa 1895 engraving, illustration of a Patent Radiophone, also known as a photophone. The photophone (later given the alternate name radiophone) is a telecommunications device which allowed for the transmission of speech on a beam of light, invented by Alexander Graham Bell and his assistant Charles Sumner Tainter.
SOURCE: ORIGINAL 19th CENTURY ENGRAVING.
Size: 5878px × 3873px
Photo credit: © Old Paper Studios / Alamy / Afripics
License: Licensed
Model Released: No
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