Sketch of Alexander Graham Bell's telephone of 1876. Scottish-born American inventor Bell (1847-1922) filed the patent for his telephone at the United States Patent Office at 3pm on 14 February 1876, just 2 hours before a rival device developed by Elisha Gray. From the Library of Congress.
Pixel Dimensions (W x H) : 3945x2654
File Size : 30,674kb