| All Patents in class 451/18 |
Patents 16 -
21
of 21
      |
| Number | Date | Patentee | Title | Type |
| 1,965,234 | Jul. 03, 1934 | F.S. Haas | Grinding Machine | grinding machines |
| 2,036,658 | Apr. 07, 1936 | B.F. Stowell | Automatic grinding machine | grinders |
| 2,149,409 | Mar. 07, 1939 | B.F. Stowell, R.S. Pyne, F.D. Van Norman | Oscillating grinder | grinders |
| 2,205,373 | Jun. 18, 1940 | J. Decker | Grinding Machine | grinding machines |
| 2,254,002 | Aug. 26, 1941 | H. Ernst, J. Decker | Grinding Machine | grinding machines |
| 2,292,875 | Aug. 11, 1942 | R.E. Flanders | Tool Carrier Control Mechanism | thread grinders |
