Research topic: Elisha Gray

Elisha Gray 1835-1901, American inventor, b. Barnesville, Ohio. He patented many electrical devices, most of them having to do with the telegraph . His telautograph (1888) for transmitting handwriting and line drawing was widely used. While experimenting in 1875 with the idea of sending musical notes by wire, as a means of sending several messages simultaneously over the same wire, he hit upon the idea of transmitting the human voice and early in 1876 filed with the patent office a caveat for such an invention. Alexander Graham Bell 's final patent had been registered just a few hours before.... Read more