US Patent: 133,422
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| Wrenches
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Patentee:
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| Frank Leo Delfer (exact or similar names) - Burlington, IA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Nov. 26, 1872 |
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Patent Pictures:
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1 | 2
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F. L. Delfer Pat. Nov. 26, 1872 |
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Stan Schulz
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Description: |
| The wrench has combined quick and screw adjust. The unique feature is specialized jaw shapes coordinated with specialized nut shapes with the intent of having the wrench hold nuts without employing a clamping action. |
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