[DOC] [TLE] Telephone Transmitter - The Edison Papers [PAR] When Edison began working on the telephone in 1876 he focused on the weak ... 
In Bell's transmitter, sound waves vibrated a permanent magnet that in turn set up 
... In order to vary the resistance of the current, Edison decided to use carbon. [DOC] [TLE] Invention of the telephone - Wikipedia [PAR] The invention of the telephone was the culmination of work done by many 
individuals, and ... He observed that connecting and disconnecting the current 
caused a ringing ... The anti-sidetone circuit later introduced by Bell Telephone 
instead .... to the experimental telephone transmitter tested by Bell on March 10, 
1876, a fact... [DOC] [TLE] Carbon microphone - Wikipedia [PAR] The carbon microphone, also known as carbon button microphone, button 
microphone, ... Carbon microphones, usually modified telephone transmitters, 
were widely used ... Contrary to Edison, Hughes decided not to take out a patent; 
instead, he .... carbon microphone), filed March 24, 1892, issued November 1, 
1892 (Bell... [DOC] [TLE] The Telephone  A Brief History and Who Invented It [PAR] Bell's ambition was to succeed and in 1876 he obtained his first patent, this 
resulted in ... 1877, Thomas Alva Edison, Carbon button microphone, took 15 
years to .... of a call the telephone hook switch was introduced, hence the term 
off hook. [DOC] [TLE] Telephone History Part 4: 1876 to 1892  privateline.com [PAR] Privateline.com's Telephone History Page 4 1876 to 1892 ... Watson later 
recalled Bell . . . had a habit of celebrating by what he called a war dance and ... 
It relies on an unusual property of carbon, its conductivity to electricity varies with 
pressure. ... Bell's first telephone transmitter used the human voice to generate a 
weak... [DOC] [TLE] Talking Wires: The Development of the Telephone [PAR] Jul 26, 1996 ... This device, the carbon microphone, was invented by both Edison and Francis 
..... Bell's patent application was filed in 1876: he was twenty-nine years old. ... 
Many companies tried to introduce their own telephones and Bell's... [DOC] [TLE] The Telephones of Thomas Edison [PAR] Edison is best known in telephony for the carbon transmitter that was the basis of 
... is a caveat filed by Edison in January 1876, prior to Bell's patent application. ... 
it for analysing sounds, and he always gave Bell the credit for the Telephone. [DOC] [TLE] Graham Bell was given the patent of telephone in 1876 [PAR] At the time of invention of telephone in 1876, the telegraph was already a mature 
... and introduced a system of visual speech and Graham Bell was very interested 
in ... of this he knew Bell from his experiences for the deaf) and Thomas Sanders. 
... Bell's microphone actually was composed of carbon granules as they reflect... [DOC] [TLE] Western Electric Products - Telephones - Posters - The Bell System [PAR] The Bell System Telephone Story Poster - The AT&T Telephone Story (1990/
1993) ... These first historic words, uttered by Alexander Graham Bell when he 
spilled some sulphuric ... 1876 - BELL'S CENTENNIAL MODEL - Progressing 
rapidly, Bell ... of the Blake carbon transmitter greatly aided the fledging 
telephone service. [DOC] [TLE] Early Communication 1870 - 1900 Text File - Angelo State University [PAR] On March 10, 1876 Bell and Watson had a breakthrough. ... Watson was only 22 
years old when he heard Bell speak to him over the telephone. ... Blake 
Manufacturing Company Blake Transmitter (1878-1890) Francis Blake invented 
this solid carbon transmitter. ... This phone introduced the "solid back" transmitter 
of 1890. [DOC] [TLE] Birth of the Microphone: How Sound Became Signal | WIRED [PAR] Jan 11, 2011 ... Bell himself was so impressed with the carbon-button that he bought the ... in 
today's money), so he could use it in his telephone prototypes. [DOC] [TLE] Telephones - Engineering and Technology History Wiki [PAR] Jan 9, 2015 ... In Bell's key patent, 174,465, awarded on March 7, 1876, he received ... The 
commercial phones introduced by the Bell Telephone Company in ...

Question: In 1876 he introduced a carbon transmitter for Bell's telephone
Answer: Thomas Edison