The birth of radio came through the emergence of two new technologies recording and
sound reproduction. The ever changing invention patent distributions and company buy
outs have made the broadcasting industry a variable battle field of knowledge. The
following are some of the inventors and companies that made early broadcasting
possible. In 1877 Thomas Edison made the first recording of a human voice,
he was experimenting with a method of recording and repeating telegraph signals so that
messages could be automatically relayed at a faster speed. Edison also invented the
carbon telephone transmitter, this invention led to the development of the microphone,
which made early radio possible. Meanwhile the American Graphophone Company was
organized in Philadelphia to help improve the graphophone. A small plant was
established in Bridgeport Connecticut to build 3-4 machines daily. Jesse H. Lipincott
acquired the rights to the company to rent or sell the gramaphone under Bell (Alexander
Graham Bell) and Tainter (Sumner Tainter) patents. Later Lippincott purchased the
Edison Speaking Phonograph Company.
In 1893 Nikola Tesla a Serbian-American inventor, electrical engineer, and scientist
made the first public demonstration of radio communication at the Franklin Institute in
Philadelphia and the National Electric Light Association, he described and demonstrated
the principles of radio communication. George Westinghouse bought the patent rights to
Nikola Tesla's polyphase system of alternating-current dynamos transformers and
Eldridge Johnson was born in Wilmington Delaware. In 1906 he started to develop a
spring motor for a disc talking machine for the Berliner Company. Johnson's first patent
for the machine was granted on March 22, 1898. The Montross Metal Shingle Company
of Camden New Jersey took an order for Eldridge Johnson to make 1000 units @ $4.00
each f...