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| Patents for Frank G. Campbell | |||||
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| Number | Date | Patentee | Title | Type | |
| 782,238 | Feb. 14, 1905 | B.M. Hanson | Steady Rest for Metal Working Machines | metal lathe accessories and attachments | |
| 859,063 | Jul. 02, 1907 | H.H. Henson | Nut Lock | auxiliary wrenches | |