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
OTD
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.