| All Patents in class 451/244 |
Patents 1 -
15
of 74
      |
| Number | Date | Patentee | Title | Type |
| 1,264,930 | May 07, 1918 | L.R. Heim | Roll Grinding Machine | |
| 1,575,520 | Mar. 02, 1926 | W.D. Archea | Work Carrying Device for Grinding Machines | centerless grinders |
| 1,575,558 | Mar. 02, 1926 | W.D. Archea, L.F. Nenninger, S. Einstein | Centreless Grinding Machine | centerless grinders |
| 1,611,135 | Dec. 14, 1926 | F.C. Sanford | Grinding Machine | centerless grinders |
| 1,611,136 | Dec. 14, 1926 | F.C. Sanford | Centerless Grinding Machine for Tapering Drills and the Like | centerless grinders |
| 1,665,084 | Apr. 03, 1928 | J.E. Caster | Grinding Machinery | grinding machines |
| 1,676,620 | Jul. 10, 1928 | C.H. Norton | Grinding Apparatus | grinding machines |
| 1,688,103 | Oct. 16, 1928 | W.D. Archea | Work Rest and Ejecting Device for Grinding Machines | grinding machines |
| 1,707,708 | Apr. 02, 1929 | J.E. Caster | Process for the Production of Spherical Articles | grinding machines |
| 1,709,818 | Apr. 16, 1929 | G.W. Binns | Grinding | grinding machines |
| 1,722,387 | Jul. 30, 1929 | C.H. Norton | Centerless Grinding Machine | grinding machines |
| 1,722,388 | Jul. 30, 1929 | C.H. Norton | Method of Grinding Small Cylindrical Objects | grinding machines |
| 1,729,780 | Oct. 01, 1929 | H.W. Holmes | Centerless Grinding Machine | grinding machines |
| 1,733,093 | Oct. 22, 1929 | C. Booth | Grinding | grinding machines |
| 1,733,097 | Oct. 22, 1929 | H.W. Holmes | Centerless Grinding Machine | grinding machines |
