US Patent: 461,714
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| Pipe Wrench
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Patent Dates:
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| Applied: |
Jul. 08, 1891 |
| Granted: |
Oct. 20, 1891 |
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Patent Pictures:
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John Ryan patent October 20, 1891 |
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Stan Schulz
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Description: |
| Movable jaw and adjusting nut are unremarkable. The combination jaw and frame on the handle are the primary innovation in this patent.
Ken Cope's "American Wrench Makers 1830-1930" cites a Scientific American listing that indicates Ryan intended to put this in production. |
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