US Patent: 424,858
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| Wrench
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Patentee:
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| John Clark (exact or similar names) - Brooklyn, NY |
| USPTO Classifications: |
| 81/99 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 15, 1889 |
| Granted: |
Apr. 01, 1890 |
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Patent Pictures:
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John Clark patent April 1, 1890 |
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Stan Schulz
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Description: |
| The springs on the back tend to close the jaws; the side lever opens the jaws. The movable jaw parallel to the main shank is adjustable by a screw. |
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