US Patent: 429,553
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| Wrench
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Patentees:
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| Johann Wirtz (exact or similar names) - Columbus, OH |
| Frederick M. Wirtz (exact or similar names) - Columbus, OH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 28, 1890 |
| Granted: |
Jun. 03, 1890 |
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Patent Pictures:
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Frederick M. Wirtz and Johann Wirtz patent June 3, 1890 |
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Stan Schulz
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Description: |
| Self-adjusting nut wrench. The outer jaw is connected to the handle by a link. The inner jaw is slid in and out by a pin connected to the handle. |
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