US Patent: 728,410
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| Wrench
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Patentee:
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| John J. Quinlan (exact or similar names) - Boston, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 19, 1903 |
| Granted: |
May 19, 1903 |
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Patent Pictures:
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John J. Quinlan patent May 19,1903 |
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Stan Schulz
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Description: |
| A cam wheel in the handle engages a toothed rack with a toothed bar extending from the movable jaw to hold the adjustment. The structure is intended to facilitate one-handed operation. |
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