US Patent: 439,919
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| Wrench
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Patentee:
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| Nicholas M. Willet (exact or similar names) - Detroit, MI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Nov. 25, 1889 |
| Granted: |
Nov. 04, 1890 |
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Patent Pictures:
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Nicholas M. Willet patent November 04, 1890 |
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Stan Schulz
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Description: |
| The patent is for the corrugated roller, connecting links, and spring catch to hold the roller out of the way when not in use. The roller enables a smooth jaw nut wrench to grip pipe. |
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