Invention of the telephone Gray's led to the myth that Bell had arrived at the Patent Office earlier. Bell was in Boston on February 14 and did not know this happened until later. Gray later abandoned his caveat and did not contest Bell's priority. That opened the door to Bell being granted US patent 174465 for the telephone on March 7, 1876. In 1906 the citizens of the City of Brantford, Ontario, Canada and its surrounding area formed the Bell Memorial Association to commemorate the invention of the telephone by Alexander Graham Bell in July 1874 at his parent's home, Melville House, near Brantford.
Tin can telephone as to avoid coming into contact with the object around which the signal is to be directed. Tin can telephone A tin can telephone is a type of acoustic (non-electrical) speech-transmitting device made up of two tin cans, paper cups or similarly shaped items attached to either end of a taut string or wire. It is a form of mechanical telephony, where sound is converted into and then conveyed by vibrations along a liquid or solid medium, and then reconverted back to sound. Before the invention of the electromagnetic telephone, there were mechanical acoustic devices for transmitting spoken words and