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| Patents for John Campbell | |||||
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| Picture | Number | Date | Patentee | Title | |
| 4,774X | May 31, 1827 | J. Campbell | Machine for hulling and cleaning rice | ||
 | 100,072 | Feb. 22, 1870 | W. Ritchie | Improvement in Instruments for Drawing Geometrical Lines | |
 | 254,110 | Feb. 28, 1882 | J. Campbell | Machine for sawing railway ties | |
 | 271,219 | Jan. 30, 1883 | J. Campbell | Double End Block Plane | |
 | RE10,394 | Oct. 23, 1883 | J. Campbell | Double End Block Plane | |
 | 320,217 | Jun. 16, 1885 | J. Campbell | Log-loader | |
 | 388,902 | Sep. 04, 1888 | S.F. Moore, J.C. Miller | Saw-mill | |