US Patent: 119,596
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| Monkey Wrench
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Patentee:
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| John Gates (exact or similar names) - Portland, OR |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 27, 1870 |
| Granted: |
Oct. 03, 1871 |
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Patent Pictures:
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John Gates Pat. Oct. 3, 1871 |
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Stan Schulz
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Description: |
| The patented features are the notched main bar and the shape of the adjusting screw which enable the adjusting screw to be sprung into place after the frame is assembled. |
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