File:Bell's drawing for Patent 161739 granted by U.S. PTO in April 1875.jpg
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Summary
Bell's drawing for his application for a patent for a primitive fax machine (which he called the "autograph telegraph") showed multiple liquid transmitters.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 06:13, 12 January 2017 | | 1,467 × 469 (49 KB) | 127.0.0.1 (talk) | Bell's drawing for his application for a patent for a primitive fax machine (which he called the "autograph telegraph") showed multiple liquid transmitters. |
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