Edison Records
Thomas A. Edison invented the phonograph, the first device for recording and playing back sound, in 1877. After patenting the invention and benefiting from the publicity and acclaim it received, Edison and his laboratory turned their attention to the commercial development of electric lighting, playing no further role in the development of the phonograph for nearly a decade. Edison's original phonograph recorded on sheets of tinfoil and was little more than a crude curiosity, although one that fascinated much of the public. These earliest phonographs were sold mainly to entrepreneurs who made a living out of traveling around the country giving "educational" lectures in hired halls or otherwise demonstrating the device to audiences for a fee. The tinfoil phonograph was not fit for any real practical use and public interest soon waned.
Thomas A. Edison, Inc.
The company had divisions handling different products such as phonographs, Ediphone and storage batteries.
One of the first products were Blue Amberol cylinders and the Amberola player, an early sound recording medium and player. This was followed by the Edison Diamond Disc. 
In 1915 the soprano Anna Case and contralto Christine Miller showed in a tone test at the West Orange lab that there was no difference between their live voices and Diamond Disc recordings of their voices.
Other Edison companies were absorbed in the years that followed, including Edison Phonograph Works (28 August 1924), Edison Storage Battery Company (30 June 1932) and Emark Battery Corporation (30 December 1933).
In the 1920s the recording company began to lag in technical innovation, and also failed to attract recording stars of the same quality as its rivals Victor and Columbia. An attempt to market a long playing record in 1926 did not succeed. In 1928 the company finally moved into radio with the purchase of the Splitdorf Radio Corp.
On 1 November 1929 Edison halted production of records apart from dictation records made by the Voicewriter division.
In the late 1920s the "Edicraft" line of high-quality consumer appliances was developed at the laboratory and manufactured by Thomas A. Edison, Inc. Production of appliances was discontinued in 1934 due to lack of demand for luxury goods during the Great Depression.