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| Patents for R. F. Campbell | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 53,899 | Apr. 10, 1866 | H.H. Andresen, E.K. Thomas | Improvements in Planes for Making Blind-Splats | |
| 70,755 | Nov. 12, 1867 | J. Small | Machine for Tempering Saws, Files, etc. | ||
 | 82,450 | Sep. 22, 1868 | J.B. Tarr | Improvement in carpenters' planes | |