US Patent: 822,407
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| Pipe Wrench
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Patentee:
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| Charles H. Thurston (exact or similar names) - Worcester, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Aug. 19, 1905 |
| Granted: |
Jun. 05, 1906 |
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Patent Pictures:
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Charles H. Thurston patent June 5, 1906 |
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Stan Schulz
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Description: |
| Screw adjusting frame, with a compression spring and "plug" to keep the swinging hook jaw "normally closed." The fixed jaw is replaceable. |
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