On This Day in Telephone History May 16TH 1876 Thomas Edison Files First Patent Application for Acoustic Telegraphy. U.S. Patent 182,996 was granted October 10, 1876.

On This Day in Telephone History May 16TH 1876

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On This Day in Telephone History May 16TH 1876 Thomas Edison Files First Patent Application for Acoustic Telegraphy. U.S. Patent 182,996 was granted October 10, 1876.

 

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