| All Patents in class 451/244 |
Patents 16 -
30
of 74
      |
| Number | Date | Patentee | Title | Type |
| 1,733,863 | Oct. 29, 1929 | J.E. Caster | Centerless Grinding | grinding machines |
| 1,757,612 | May 06, 1930 | W.D. Archea, G.W. Binns | Centerless Grinding Machinery | grinding machines |
| 1,772,932 | Aug. 12, 1930 | S. Einstein | Grinding Machinery | grinding machines |
| 1,791,713 | Feb. 10, 1931 | L.F. Nenninger, J.E. Caster | Centerless Grinder | grinding machines |
| 1,814,279 | Jul. 14, 1931 | G.W. Binns | Hopper Feed | grinding machines |
| 1,814,350 | Jul. 14, 1931 | F.J. Theler | Grinding Machinery | grinding machines |
| 1,814,362 | Jul. 14, 1931 | C. Booth | Centerless Grinding Machinery | grinding machines |
| 1,814,363 | Jul. 14, 1931 | C. Booth | Grinding Machinery | grinding machines |
| 1,814,364 | Jul. 14, 1931 | C. Booth | Valve Grinder | grinding machines |
| 1,816,170 | Jul. 28, 1931 | C. Booth | Grinding Machinery | grinding machines |
| 1,816,171 | Jul. 28, 1931 | C. Booth | Valve Grinder | grinding machines |
| 1,825,797 | Oct. 06, 1931 | C.W. Hopkins | Grinding Machine | grinding machines |
| 1,828,387 | Oct. 20, 1931 | C. Booth | Grinding Machine | grinding machines |
| 1,834,158 | Dec. 01, 1931 | G.V. Johnston | Grinding Machine | grinding machines |
| 1,843,079 | Jan. 26, 1932 | C. Booth | Grinding Machinery | grinding machines |
