US Patent: 498,137
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| Wrench
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Patentee:
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| Hugh McDonald (exact or similar names) - Williamsport, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 05, 1892 |
| Granted: |
May 23, 1893 |
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Patent Pictures:
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Hugh McDonald patent May 23, 1893 |
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Stan Schulz
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Description: |
| The patent describes the shape and function of the open recess for the sliding portion of the the movable jaw, the opening for the adjusting nut, and the extended opening for the "tail" of the movable jaw. |
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