Image:TelephonePatentDrawingBell.jpg
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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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| Date/Time | Dimensions | User | Comment | |
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| current | 05:50, 15 December 2004 | 864×1,200 (150 KB) | Brian0918 (Talk | contribs) | (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 A) |
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