High Quality Content by WIKIPEDIA articles! The Photophone was invented jointly by Alexander Graham Bell and his assistant Charles Sumner Tainter on February 19, 1880. Bell believed the photophone was his most important invention. The device allowed for the transmission of sound on a beam of light. On June 3, 1880, Bell transmitted the world's first wireless telephone message on his newly invented form of telecommunication, the far advanced precursor to fiber-optic communications.

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