| All Patents in class 451/144 |
Patents 1 -
8
of 8
      |
| Picture | Number | Date | Patentee | Title |
| | 667,321 | Feb. 05, 1901 | M.L. Keyes | Edge Tool Grinder |
 | 861,738 | Jul. 30, 1907 | A.B. Landis | Grinding-machine |
 | 1,419,073 | Jun. 06, 1922 | C.H. Norton | Machine for forming rolls |
 | 1,624,211 | Apr. 12, 1927 | W.L. Bryant | Multispindle internal-combustion machine |
| | 1,840,231 | Jan. 05, 1932 | F.S. Haas, R.E. Harrison | Grinding Machine |
| | 2,425,859 | Aug. 19, 1947 | O.M. Braaten | Cutter Grinder |
 | 2,448,245 | Aug. 31, 1948 | H.F. Bakewell | Grinding fixture |
| | 3,902,278 | Sep. 02, 1975 | R.E. Crossman, H.R. Uhtenwoldt | Grinding Machine for Generating an Epitrochoidal Surface |
