US Patent: 387,456
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| Wrench
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Patentee:
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| Jonathan Moore Silvis (exact or similar names) - Kittanning, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 17, 1888 |
| Granted: |
Aug. 07, 1888 |
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Patent Pictures:
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Jonathan Moore Silvis patent August 7, 1888 |
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Stan Schulz
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Description: |
| The handle is extensible, the head can ratchet or be set solid to the handle. The jaws adjust. Coil springs slide them open when the catches are released. |
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