US Patent: 763,590
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| Wrench
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Patentee:
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| Ray J. Berthoud (exact or similar names) - Swanton, OH |
| USPTO Classifications: |
| 81/64 |
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Patent Dates:
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| Applied: |
Jan. 21, 1903 |
| Granted: |
Jun. 28, 1904 |
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Patent Pictures:
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Ray J. Berthoud patent June 28, 1904 with ad for BERTHOUD JAR WRENCH |
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Stan Schulz
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Description: |
| Band type jar wrench; as constructed a thumb lever relaxes the grip of the spring metal band.
Production information based on contemporary advertising. |
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