US Patent: 1,403,334
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| Wrench
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Patentee:
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| Cloyd A. McIlvaine (exact or similar names) - Balboa Heights, Canal Zone, Panama |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 25, 1921 |
| Granted: |
Jan. 10, 1922 |
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Patent Pictures:
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1,403,334 - edited image |
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Stan Schulz
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Description: |
| The patent covers the handle structure with spring-tensioned "cam" which provides supplemental support for the adjusting screw, and related structure of the screw.
Munn & Co.- patent attorneys
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