US Patent: 1,406,910
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| Wrench
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Patentee:
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| Harry C. Sutherland (exact or similar names) - Oak Park, IL |
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Patent Dates:
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| Applied: |
Jan. 10, 1921 |
| Granted: |
Feb. 14, 1922 |
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Patent Pictures:
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1 | 2
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Harry C. Sutherland patent February 14, 1922 |
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Stan Schulz
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Description: |
| A self-adjusting wrench with a spring-loaded hook jaw. The patent has a "trigger" to hold the jaw in the open position.
In the spring of 2008, Martin Donnelly's mjdtools spring auctions included a prototype of this wrench along with an archive of business start-up documents. A Mr. Bystrom figures prominently in these documents. |
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