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| Patents for Peter Campbell | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-5,749 | Mar. 02, 1876 | P. Campbell | Campbell's Self-Adjusting Wrench | self-adjust wrenches | |
| 207,500 | Aug. 27, 1878 | P. Campbell | Combined Wrench and Tool for Locking Nuts in Position Upon Bolts | nut wrenches | |