US Patent: 447,665
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| Wrench
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Patentee:
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| Frank S. Cook (exact or similar names) - Chicago, IL |
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Patent Dates:
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| Applied: |
Dec. 29, 1890 |
| Granted: |
Mar. 03, 1891 |
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Patent Pictures:
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1 | 2
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Frank S. Cook patent March 3, 1891 |
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Stan Schulz
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Description: |
| The patent is for the "duplex pipe-gripping pawl" including the springs. The wrench body to which the patent applies is covered by pat. no. 273,170.
Marketed as the HERCULES combination nut and pipe wrench. |
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