This Day in Patent History - On November 29, 1881, Francis Blake was granted a patent for the speaking phone

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On November 29, 1881, Francis Blake was granted a patent for the speaking phone. Blake was elected a member of the American Antiquarian Society in 1900.

On November 29, 1881, Francis Blake was granted a patent for the speaking phone

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Patent Information
Publication number: US250126 A
Patent Title: Speaking-telephone
Publication type: Grant
Publication date: Nov 29, 1881
Filing date: Sep 15, 1881
Inventors: Francis Blake

US250126

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