invention of the telephone wikipedia - EAS
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檢視所有 Wikipediahttps://en.wikipedia.org/wiki/Invention_of_the_telephoneThe invention of the telephone was the culmination of work done by more than one individual, and led to an array of lawsuits relating to the patent claims of several individuals and numerous companies. 查看更多內容
The concept of the telephone dates back to the string telephone or lover's telephone that has been known for centuries, comprising two diaphragms connected by a taut string or wire. Sound waves are carried as … 查看更多內容
Water microphone – Elisha Gray
Elisha Gray recognized the lack of fidelity of the make-break transmitter of Reis and Bourseul and … 查看更多內容• Telephones portal
• History of the telephone
• The Telephone Cases, U.S. patent dispute and infringement … 查看更多內容
Elisha Gray
Elisha Gray, of Highland Park, Illinois, also devised a tone telegraph of this kind about the same time as La Cour. In Gray's tone telegraph, several vibrating steel reeds tuned to different frequencies interrupted the current, … 查看更多內容Additional inventions such as the call bell, central telephone exchange, common battery, ring tone, amplification, trunk lines, and wireless phones – at first cordless and then fully mobile – made the telephone the useful and widespread apparatus as it is now. 查看更多內容
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 查看更多內容
CC-BY-SA 授權下的維基百科文字- https://en.wikipedia.org/wiki/History_of_the_telephone
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.
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Telephone - Wikipedia
https://en.wikipedia.org/wiki/TelephoneThe invention of the transistor in 1947 dramatically changed the technology used in telephone systems and in the long-distance transmission networks, over the next several decades. With the development of stored program control and …
- https://en.wikipedia.org/wiki/Alexander_Graham_Bell
Alexander Graham Bell (/ ˈ ɡ r eɪ. ə m /, born Alexander Bell; March 3, 1847 – August 2, 1922) was a Scottish-born inventor, scientist and engineer who is …
- Children: 4
- 職業: Inventor, scientist, engineer, professor ᵃ, teacher of the deaf
- https://en.wikipedia.org/wiki/Timeline_of_the_telephone
10 August 1876: Alexander Graham Bell makes the world's first long-distance telephone call, one-way, not reciprocal, over a distance of about 6 miles, between Brantford and Paris, …
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- https://en.wikipedia.org/wiki/Talk:Invention_of_the_telephone
Alexander Graham Bell, a Scottish-born inventor, scientist, philanthropist and teacher of the deaf is the person most widely credited as the inventor of the electric telephone. On March 7th …
Invention du téléphone — Wikipédia
https://fr.wikipedia.org/wiki/Invention_du_téléphoneAntonio Meucci [ modifier | modifier le code] Antonio Meucci, né le 13 avril 1808 à San Frediano, un quartier de la commune de Florence en Toscane et mort le 18 octobre 1889 à Staten Island, …
- https://en.wikipedia.org/wiki/Mobile_phone
A mobile phone is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area. The radio frequency link …
- https://www.ericsson.com/.../phones-for-everyone/the-invention-of-the-telephone
The invention of the telephone. It was at this time, 1876–1877, that a new invention called the telephone emerged. It is not easy to determine who the inventor was. Both Alexander …
- https://en.wikipedia.org/wiki/History_of_mobile_phones
Enabling technology for mobile phones was first developed in the 1940s but it was not until the mid-1980s that they became widely available. By 2011, it was estimated in Britain that more calls were made using mobile phones than …
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