On This Day in Telephone History August 27TH 1896
On This Day in Telephone History August 27TH 1896 Rotary Dial Telephones were put into Service in the Milwaukee, Wisconsin City Hall
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On This Day in Telephone History August 6TH 1940
On This Day in Telephone History August 6TH 1940 W.H. Doherty of Bell Telephone Laboratories was granted U.S. Patent 2,210,028 on a high efficiency amplifier for radio transmission which speedily came into wide use.