| All Patents in class 451/555 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 41,646 | Feb. 16, 1864 | D. Slate | Improved apparatus for grinding cutter-bits for rifling-machines | |
| 609,046 | Aug. 16, 1898 | R.E. Poindexter | Knife or scissors sharpener | sharpening jigs and fixtures |
| 612,912 | Oct. 25, 1898 | R.E. Poindexter | Knife-sharpener | sharpening jigs and fixtures |
| 620,050 | Feb. 21, 1899 | R.E. Poindexter | Knife-sharpener | sharpening jigs and fixtures |
| 1,254,671 | Jan. 29, 1918 | S.H. Gallagher | Sharpener for Knives, Scissors and the Like | cutler |
| 1,269,272 | Jun. 11, 1918 | A.B. Floback | Device for Sharpening Knives, Scissors, and Like Cutting Implements | scissor sharpeners |
| 1,273,624 | Jul. 23, 1918 | W. Krolius | Skate Sharpener | |
