US Patent: 900,861
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| Wrench
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Patentees:
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| Mahlon E. Layne (exact or similar names) - Houston, Harris County, TX |
| Samuel N. Hall (exact or similar names) - Houston, Harris County, TX |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 30, 1906 |
| Granted: |
Oct. 13, 1908 |
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Patent Pictures:
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Mahlon E. Layne & Samuel N. Hall patent Oct. 13, 1908 |
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Stan Schulz
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Description: |
| Chain wrench with paired jaw pieces bolted to a handle; the jaws designed such that the wrench could turn pipe in either direction without removing it from the pipe. Part of each jaw is replaceable. The design of the chain is also described.
See also Layne & Hall's earlier chain wrench patents 889,245 & 889,246. |
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