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| All Patents in class 81/185.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,551,763 | Sep. 01, 1925 | R.C. Morris | Pipe or Nut Wrench With Gripping Action | wrench jaw components | |
| 3,613,486 | Oct. 19, 1971 | W.C. Chapman | Pipe Wrench Adapter. | pipe jaw attachments for wrenches | |