| Patents for John Campbell |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 4,774X | May 31, 1827 | J. Campbell | Machine for hulling and cleaning rice | miller |
| 100,072 | Feb. 22, 1870 | W. Ritchie | Improvement in Instruments for Drawing Geometrical Lines | compasses |
| 254,110 | Feb. 28, 1882 | J. Campbell | Machine for sawing railway ties | circular sawmills |
| 271,219 | Jan. 30, 1883 | J. Campbell | Double End Block Plane | bench planes |
| RE10,394 | Oct. 23, 1883 | J. Campbell | Double End Block Plane | bench planes |
| 320,217 | Jun. 16, 1885 | J. Campbell | Log-loader | sawmill accessories |
| 388,902 | Sep. 04, 1888 | S.F. Moore, J.C. Miller | Saw-mill | sawmill carriages |
