US Patent: 404,619
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| Pipe Wrench
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Patentee:
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| John Thomas Hawkins (exact or similar names) - Taunton, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 07, 1888 |
| Granted: |
Jun. 04, 1889 |
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Patent Pictures:
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John T. Hawkins patent June 4, 1889 |
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Stan Schulz
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Description: |
| An adjustable "stop" in an alligator wrench prevents pipe from jamming too far into the "V" and crushing.
Patent no. 413,940 (Oct. 29, 1889) is a further refinement -- Canadian patent CA-34,269 (May 7, 1890) combines features of both patents into one set of claims. |
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