US Patent: 397,988
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| Thumb Nut Wrench
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Patentee:
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| Charles W. Kimball (exact or similar names) - Chicago, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 05, 1888 |
| Granted: |
Feb. 19, 1889 |
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Patent Pictures:
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Charles W. Kimball patent February 19, 1889 |
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Stan Schulz
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Description: |
| A large-proportioned wing nut form with a slot for insertion of a square nut. If constructed as shown in the drawing, this would end up being "locked into place" by the nut it manipulates. |
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