US Patent: 109,665
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| Improvement in the Manufacture of Wrenches
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Patentee:
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| John Richards (exact or similar names) - Philadelphia, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Nov. 29, 1870 |
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Patent Pictures:
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John Richard process patent Nov. 29, 1870 |
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Stan Schulz
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Description: |
| The patent is for a manufacturing process. In the process, the handle and central core of the head is formed from iron. Side plates of hard steel are welded to the sides of the head to strengthen and increase the durability of the portions subject to wear. The finished tools are case hardened. |
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