| All Patents of Type: sharpeners |
Patents 1 -
15
of 39
      |
| Number | Date | Patentee | Title | Type |
| 240X | Mar. 16, 1799 | J. Shotwell | Sharpening axes | sharpeners |
| 5,499X | Jun. 11, 1829 | B. Swift | Sharpening Scythes with a Rifle | sharpeners |
| 78,909 | Jun. 16, 1868 | W.H. Wilson, G.P. York | Sharpening Mowing-Machine Knives | sharpening machines |
| 79,030 | Jun. 16, 1868 | J.A. Thompson | Sharpening Mowing-Machine Knives | sharpening machines |
| 342,125 | May 18, 1886 | J.C. Neff | Mower and Reaper Knife Grinder | sharpeners |
| 342,290 | May 18, 1886 | R. Dutton | Machine for Grinding Mowing Machine Knives | sharpeners |
| CA-24,338 | Jun. 17, 1886 | R. Dutton | Machine for grinding mower-knives | sharpeners |
| 359,964 | Mar. 22, 1887 | R. Dutton | Machine for grinding mower-knives | sharpeners |
| CA-26,397 | Apr. 05, 1887 | R. Dutton | Machine for grinding mower-knives | sharpeners |
| 395,615 | Jan. 01, 1889 | R. Dutton | Machine for grinding mower-knives | sharpeners |
| CA-32,970 | Dec. 02, 1889 | R. Dutton | Machine for grinding mower-knives | sharpeners |
| 457,079 | Aug. 04, 1891 | R. Dutton | Machine for grinding mower-knives | sharpeners |
| 481,275 | Aug. 23, 1892 | R. Dutton | Machine for grinding mower-knives | sharpeners |
| 503,127 | Aug. 15, 1893 | R. Dutton | Machine for grinding mower-knives | sharpeners |
| 534,470 | Feb. 19, 1895 | G.H. Fowler | Harvester-knife grinder | sharpeners |
