3 Free Photos of Invention Of The Telephone

historyhistoricalalexander graham bellelisha gray and alexander bell telephone controversy
P.D. Richards drawing of Bell experiments in early 1873
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Bell's drawing for Patent 161739 granted by U.S. PTO in April 1875
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House in which Daniel Drawbaugh invented the first telephone in the early 1860's LCCN2002736593
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