US Patent: 111,422
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| Pipe Wrench
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Patentee:
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| Oramel Graves Barrett (exact or similar names) - Boston Highlands, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Jan. 31, 1871 |
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Patent Pictures:
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O.G. Barrett Pat. Jan 31, 1871 |
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Stan Schulz
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Description: |
| The pivot point for the hook jaws can be changed by a series of holes in the jaws and shank. The specifications differentiate this patent from J.H. Doolittle's March 27, 1860 patent (no. 27,622), which has a single hook jaw. |
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