US Patent: 421,023
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| Pipe Wrench
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Patentees:
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| William George Bartlett (exact or similar names) - Camp Charlotte, TX |
| John William McCoy (exact or similar names) - Camp Charlotte, TX |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 16, 1889 |
| Granted: |
Feb. 11, 1890 |
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Patent Pictures:
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William George Bartlett and John William McCoy patent February 11, 1890 |
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Stan Schulz
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Description: |
| Alligator jaw pipe wrench. The movable toothed jaw is connected to the handle by pivoting links. A tapered section on the handle and an angled end on the movable jaw cause the grip to tighten its grip as pressure is applied. |
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