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| Patents for J. Campbell | |||||
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| Number | Date | Patentee | Title | Type | |
| 65,796 | Jun. 18, 1867 | W.H. Doane, W.E. London | Planer-matcher | wood planers | |
| 241,490 | May 17, 1881 | J.T. Hayden | Pipe Wrench | pipe wrenches | |