| Patents for John L. Knowlton |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 22,561 | Jan. 11, 1859 | J.L. Knowlton | Stump-extractor | |
| 40,344 | Oct. 20, 1863 | J.L. Knowlton | Improved sawing machine | reciprocating saws |
| 41,707 | Feb. 23, 1864 | J.L. Knowlton | Improvement in sawmills | reciprocating sawmills |
| RE2,072 | Sep. 12, 1865 | J.L. Knowlton | Improvement in sawmills | sawmills |
| 73,536 | Jan. 21, 1868 | J.L. Knowlton | Improvement in circular-saw mills | circular sawmills |
| 76,471 | Apr. 07, 1868 | J.L. Knowlton | Improvement in sawmills | reciprocating saws |
| 106,374 | Aug. 16, 1870 | J.L. Knowlton | Improvement in lath-machine | lath making machines |
| 137,079 | Mar. 25, 1873 | J.L. Knowlton | Improvement in car-brakes | railroad car brakes |
| 155,093 | Sep. 15, 1874 | J.L. Knowlton | Improvement in steam-boilers | stationary boilers |
| 157,843 | Dec. 15, 1874 | J.L. Knowlton | Improvement in saw-mills | sawmill set works |
| 162,392 | Apr. 20, 1875 | J.L. Knowlton | Improvement in saw-sharpening machines | saw sharpening machines |
