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19 February 1880: The photophone, also called a radiophone, is invented jointly by Alexander Graham Bell and Charles Sumner Tainter at Bell's Volta Laboratory. [18] [19] The device allowed for the transmission of sound on a beam of light. 20 March 1880: National Bell Telephone merges with others to form the American Bell Telephone Company.
For a few years in the late 1800s, acoustic telephones were marketed commercially as a competitor to the electrical telephone. When the Bell telephone patents expired and many new telephone manufacturers began competing, acoustic telephone makers quickly went out of business. Their maximum range was very limited. [2]
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.
The internals of the Princess were reduced in size the same year, allowing a small, quiet bell ringer to be placed to the left of the touch-tone dial. In the mid-1970s, AT&T introduced modular connectors for the line cord and handset cords, requiring the RJ11 standard home telephone jack.
As phone lines became more popular—between 1942 and 1962, the number of phones in the U.S. grew 230% to 76 million—telephone companies realized they would run out of phone numbers.
In January 1878, the Boston Telephone Dispatch Company had started hiring boys as telephone operators, starting with George Willard Croy. [5] Boys (reportedly including Nutt's husband [2]) had been very successful as telegraphy operators, but their attitude (lack of patience) and behavior (pranks and cursing) were unacceptable for live phone contact, [6] so the company began hiring women ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 21 December 2024. Technical and legal issues surrounding the development of the modern telephone For broader coverage of this topic, see History of the telephone. Replica of Antonio Meucci's telettrofono Reis's telephone The invention of the telephone was the culmination of work done by more than one ...
The factory was run by 8 women, all of whom Hanna had trained herself. Hanna won first prize at an exhibition for power and production machinery in 1886 for her ingenuity [3]. Today, the company that originally relied on her wires is known as Ericsson, a publicly traded telecommunications company listed on the NASDAQ [4].