Slide Title: On This Day in Telephone History November 29TH 1892 Almon Brown Strowger was Awarded U.S. Patent 486,909 for the ROTARY DIAL

On This Day in Telephone History November 29TH 1892

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On This Day in Telephone History November 29TH 1892 Almon Brown Strowger was Awarded U.S. Patent 486,909 for the ROTARY DIAL

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