US Patent: 219,758
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| Pipe-Wrench
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Patentee:
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| Royal R. Piper (exact or similar names) - East Saginaw, MI |
| USPTO Classifications: |
| 81/68 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 12, 1879 |
| Granted: |
Sep. 16, 1879 |
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Patent Pictures:
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Royal R. Piper patent September 16. 1879 |
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Stan Schulz
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Description: |
| A chain wrench with a wedge-lock for the pin holding the size adjustment. The specifications note the chain and gripping teeth could be padded with leather to prevent damage to polished or plated surfaces |
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