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First Voice Transmission

Alexander Graham Bell used his own invention, the “photophone”, to transmit the first wireless telephone message on June 3, 1880.

Bell held four different patents for a version of the photophone, which was similar to the telephone but different in their methods of projection; the photophone used light as a source, while the telephone used electricity.

The first voice transmission was sent by Alexander Graham Bell at the top of the Franklin School in Washington D.C. which now carries a plaque that reads: “FROM THE TOP FLOOR OF THIS BUILDING/WAS SENT ON JUNE 3, 1880/OVER A BEAM OF LIGHT TO 1325 ‘L’ STREET/THE FIRST WIRELESS TELEPHONE MESSAGE/IN THE HISTORY OF THE WORLD.”

Sources: Library of Congress, Wikipedia

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