US Patent: 183,574
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| Improvement in Pipe-Wrenches
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Patentee:
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| Thomas Keenan (exact or similar names) - East Cambridge, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 24, 1876 |
| Granted: |
Oct. 24, 1876 |
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Patent Pictures:
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Thomas Keenan Pat. October 24, 1876 |
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Stan Schulz
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Description: |
| The movable jaw has teeth on the back side that engage teeth on the main bar, and a spring to hold it in adjustment.
The specifications differentiate this design from those described in pat. nos. 64,656 and 171,333. |
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