| Patents for William A. Campbell |
Patents 1 -
8
of 8
      |
| Picture | Number | Date | Patentee | Title |
 | 134,976 | Jan. 21, 1873 | W.A. Campbell | Improvement in circular-saw mills |
| | 301,091 | Jul. 01, 1884 | W.A. Campbell | Steam-brake for saw-mill carriages |
 | 312,250 | Feb. 17, 1885 | W.A. Campbell | Gang-edger |
 | 324,223 | Aug. 11, 1885 | W.A. Campbell | Feed mechanism for sawmill carriages |
 | 375,800 | Jan. 03, 1888 | W.A. Campbell | Saw-mill set-works |
 | 375,801 | Jan. 03, 1888 | W.A. Campbell | Saw-mill stock-roller |
 | 379,856 | Mar. 20, 1888 | W.A. Campbell | Shingle-sawing machine |
| | 401,876 | Apr. 23, 1889 | W.A. Campbell | Saw-mill set-works |
