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Assigned Patents:

*U.S. Patent No. 463,569 , 11/17/1891 (app. 06/04/1877) COMBINED TELEGRAPH AND TELEPHONE. (class: 381/178) Berliner, Emile of Washington, D.C. (assignee: American Bell Telephone Company of Boston, MA) [DjVu119KB]

 

 

 

 

 

 
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