File:Detail showing liquid transmitter in Bell's U.S. Patent No. 161739 obtained in April, 1875.jpg
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Detail_showing_liquid_transmitter_in_Bell's_U.S._Patent_No._161739_obtained_in_April,_1875.jpg (458 × 365 pixels, file size: 15 KB, MIME type: image/jpeg)
Summary
The U.S. Patent Office granted Bell a patent in April 1875 for a primitive fax machine using a transmitter using liquid mercury.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 06:13, 12 January 2017 | | 458 × 365 (15 KB) | 127.0.0.1 (talk) | The U.S. Patent Office granted Bell a patent in April 1875 for a primitive fax machine using a transmitter using liquid mercury. |
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