US Patent: 35,971
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Improvement in Wrenches
Pipe Wrench
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Patentee:
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| J. H. Doolittle (exact or similar names) - Derby, CT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 21, 1862 |
| Granted: |
Jul. 22, 1862 |
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Patent Pictures:
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J. H. Doolittle Pat. July 22 ,1862 |
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Stan Schulz
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Description: |
| The patent covers the concept of a wedge-shaped jaw pair (the angle less than 90 degrees), with one face roughened or serrated to enable it to grip pipe or round objects. This is the earliest patent for what commonly became known as the alligator wrench. |
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