| Patents for John L. Knowlton |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
 | 22,561 | Jan. 11, 1859 | J.L. Knowlton | Stump-extractor |
 | 40,344 | Oct. 20, 1863 | J.L. Knowlton | Improved sawing machine |
 | 41,707 | Feb. 23, 1864 | J.L. Knowlton | Improvement in sawmills |
 | RE2,072 | Sep. 12, 1865 | J.L. Knowlton | Improvement in sawmills |
 | 73,536 | Jan. 21, 1868 | J.L. Knowlton | Improvement in circular-saw mills |
 | 76,471 | Apr. 07, 1868 | J.L. Knowlton | Improvement in sawmills |
 | 106,374 | Aug. 16, 1870 | J.L. Knowlton | Improvement in lath-machine |
 | 137,079 | Mar. 25, 1873 | J.L. Knowlton | Improvement in car-brakes |
 | 155,093 | Sep. 15, 1874 | J.L. Knowlton | Improvement in steam-boilers |
 | 157,843 | Dec. 15, 1874 | J.L. Knowlton | Improvement in saw-mills |
