'On Feb. 14, 1876 Elisha Gray was a few hours behind this man at the U.S. Patent Office, filing a speech-transmitting device'
Bell
INVENTIVE MINDS: On Feb. 14, 1876 Elisha Gray was a few hours behind this man at the U.S. Patent Office, filing a speech-transmitting device
On Feb. 14, 1876 Elisha Gray was a few hours behind this man at the U.S. Patent Office, filing a speech-transmitting device
On Feb. 14, 1876 Elisha Gray was a few hours behind this man at the U.S. Patent Office, filing a speech-transmitting device
INVENTIVE MINDS
Bell
INVENTIVE MINDS