| All Patents in class 451/278 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 803,304 | Oct. 31, 1905 | L.A. Fletcher, W.J. Muncaster | Grinding Machine | glass grinding machines |
| 1,231,238 | Jun. 26, 1917 | R.L. Carter | Gage | sanding machines |
| 1,679,413 | Aug. 07, 1928 | H.R. Isler, L.F. Nenninger, S. Einstein | Cutter Grinder | tool grinders |
| 1,938,548 | Dec. 05, 1933 | H.E. Tautz | Machine table extension | tablesaws |
| 2,118,912 | May 31, 1938 | J.B. Armitage | Cutter Grinder | tool grinders |
| 6,676,495 | Jan. 13, 2004 | M.B. Siemers, E. Irwin, L.G. Lee, L. Sevack | Power sharpening system | |
