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Patent application from Alexander Graham Bell, undated

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Summary

Alexander Graham Bell's Telephone Patent Drawing, 03/07/1876. Bell's telephone was the first apparatus to transmit human speech via machine. His work culminated in one of the most profitable and contested of all 19th-century patents. From the National Archives.

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patents patent drawings us patent office alexander graham bell images from the national archives and records administration history of technology inventions
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Date

07/03/1876
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Wikimedia Commons
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Link

http://uspto.gov/
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public domain

label_outline Explore Us Patent Office, Images From The National Archives And Records Administration, Patent Drawings

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patents patent drawings us patent office alexander graham bell images from the national archives and records administration history of technology inventions