| All Patents in class 451/383 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 193,437 | Jul. 24, 1877 | V.F. Prentice, E.J. Worcester | Improvement in machines for grinding mower and reaper knives | grinders |
| 782,278 | Feb. 14, 1905 | M.B. Russ | Skate or Tool Holder for Grinding Machines | sharpening tool holders |
| 976,186 | Nov. 22, 1910 | E.J. Knudsen, H.C. Knudsen | Skate Jig | |
| 1,539,829 | Jun. 02, 1925 | F.L. Cole | Guard and work-rest mounting | |
| 2,416,493 | Feb. 25, 1947 | H.S. Newton | Sanding belt machine | sanding machines |
| 2,728,364 | Dec. 27, 1955 | A.A. Muehling | Universal machine tool having a swingable boom | tablesaws |
