US Patent: 102,753
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Watch Key
Improvement in Adjustable Watch-Keys
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Patentee:
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| John S. Birch (exact or similar names) - New York, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 25, 1869 |
| Granted: |
May 10, 1870 |
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Patent Pictures:
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J.S. Birch Pat. May 10, 1870 |
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Stan Schulz
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Description: |
| This patent is an improvement on Birch's Nov. 12, 1867 and April 13, 1869 (no. 88,836) patents. A larger version of Birch's self-adjusting watch key with a "T" handle was produced as a self-adjusting socket wrench. |
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