| All Patents in class 451/555 |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
 | 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 |
| | 612,912 | Oct. 25, 1898 | R.E. Poindexter | Knife-sharpener |
| | 620,050 | Feb. 21, 1899 | R.E. Poindexter | Knife-sharpener |
| | 1,254,671 | Jan. 29, 1918 | S.H. Gallagher | Sharpener for Knives, Scissors and the Like |
| | 1,269,272 | Jun. 11, 1918 | A.B. Floback | Device for Sharpening Knives, Scissors, and Like Cutting Implements |
| | 1,273,624 | Jul. 23, 1918 | W. Krolius | Skate Sharpener |
