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11 February 1876: Elisha Gray invents a liquid transmitter for use with a telephone, but he did not make one. 14 February 1876 about 9:30 am: Gray or his lawyer brings Gray's patent caveat for the telephone to the Washington, D.C. Patent Office (a caveat was a notice of intention to file a patent application.
Shows Bell's second telephone transmitter , invented 1876 and first displayed at the Centennial Exposition, Philadelphia. This history of the telephone chronicles the development of the electrical telephone, and includes a brief overview of its predecessors. The first telephone patent was granted to Alexander Graham Bell in 1876.
The telephone played a major communications role in American history from the 1876 publication of its first patent by Alexander Graham Bell onward. In the 20th century the American Telephone and Telegraph Company (AT&T) dominated the telecommunication market as the at times largest company in the world, until it was broken up in 1982 and replaced by a system of competitors.
That first patent by Bell was the master patent of the telephone, from which other patents for electric telephone devices and features flowed. [12] In 1876, shortly after Bell's patent application, Hungarian engineer Tivadar Puskás proposed the telephone switch, which allowed for the formation of telephone exchanges, and eventually networks. [13]
The Telephone Cases, 126 U.S. 1 (1888), were a series of U.S. court cases in the 1870s and the 1880s related to the invention of the telephone, which culminated in an 1888 decision of the U.S. Supreme Court that upheld the priority of the patents belonging to Alexander Graham Bell.
Two years later, he told colleagues that if he could get the patent for $25 million (equal to $789,310,345 today), he would consider it a bargain. By then, the Bell company no longer wanted to sell the patent. [104] Bell's investors became millionaires while he fared well from residuals and at one point had assets of nearly $1 million. [105]
In 1875, Bell filed a patent application for a primitive fax machine which included drawings of multiple liquid transmitters and the Patent Office granted his application as Patent No. 161739 in April, 1875—ten months before Gray filed his telephone caveat. [16]
The electric telephone was invented in the 1870s, based on earlier work with harmonic (multi-signal) telegraphs. The first commercial telephone services were set up in 1878 and 1879 on both sides of the Atlantic in the cities of New Haven , Connecticut in the US and London , England in the UK .