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
            
             motors.
            
             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 m...