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| Patents for A. C. Campbell | |||||
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| Number | Date | Patentee | Title | Type | |
| 321,828 | Jul. 07, 1885 | J. Loar | Cutter-head for matching machine | cutterheads | |
| 451,023 | Apr. 28, 1891 | J.H. Brown | Wrench | screw adjust wrenches | |