File:Fig01-BellUSPno186787 1876.png
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Fig01-BellUSPno186787_1876.png (378 × 575 pixels, file size: 80 KB, MIME type: image/png)
First page of figures from Alexander Bell's U.S. Patent no. 186,787, "Electric Telegraphy," issued 30 January 1877.
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current | 15:56, 12 April 2013 | 378 × 575 (80 KB) | Administrator7 (talk | contribs) | First page of figures from Alexander Bell's U.S. Patent no. 186,787, "Electric Telegraphy," issued 30 January 1877. |
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