US Patent: 591,167
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| Wrench
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Patentees:
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| Andrew Hammarstrom (exact or similar names) - Hastings, PA |
| Otto Carlson (exact or similar names) - Hastings, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 11, 1897 |
| Granted: |
Oct. 05, 1897 |
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Patent Pictures:
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Andrew Hammarstrom and Otto Carlson patent October 5, 1897 |
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Stan Schulz
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Description: |
| Reversible ratchet action, with provision for interchangeable heads. The drawing and specifications imply the interchangeable heads are open end, rather than in-line sockets. |
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