| All Patents in class 451/557 |
Patents 1 -
10
of 10
      |
| Number | Date | Patentee | Title | Type |
| 81,520 | Aug. 25, 1868 | J.C. McAfee | Plane with an Abrasive Medium | planes |
| 220,914 | Oct. 28, 1879 | C.M. Currier | Whetstone Holder | whetstones |
| 272,480 | Feb. 20, 1883 | H.A. Rowland | Apparatus for Grinding Screws | grinding fixtures |
| 339,683 | Apr. 13, 1886 | W.H. Parkin | Emery Knife Sharpener | sharpening apparatus |
| 430,094 | Jun. 10, 1890 | A.D. Spencer | Tool for Turning Dynamo Commutators | commutator truing tools |
| 442,062 | Dec. 02, 1890 | J.E. Lloyd | Glazier's Diamond | glazier |
| 928,154 | Jul. 13, 1909 | J.H. Prugh | Surfacing and polishing machine | sanding machines |
| 1,024,126 | Apr. 23, 1912 | M.D. Fletcher | Wheel Dresser and Tool Holder | grinder dressers |
| 1,252,612 | Jan. 08, 1918 | R.W. Perry | Sharpening Device | |
| 4,259,815 | Apr. 07, 1981 | W.G. Kuban | Blade sharpener | sharpening apparatus |
