| All Patents in class 451/19 |
Patents 1 -
14
of 14
      |
| Number | Date | Patentee | Title | Type |
| 1,534,302 | Apr. 21, 1925 | H.E. Kempton, P. Conradson, K.F. Gallimore | Grinding Machine | internal grinders |
| 1,891,662 | Dec. 20, 1932 | F.S. Haas, C. Booth | Machine Tool | grinding machines |
| 1,938,760 | Dec. 12, 1933 | H. Fritschi | Grinding Machine | grinding machines |
| 1,954,442 | Apr. 10, 1934 | H. Ernst, A.H. Dall | Grinding Machine | grinding machines |
| 1,976,125 | Oct. 09, 1934 | F.S. Haas | Grinding Machine | grinding machines |
| 1,991,953 | Feb. 19, 1935 | L.F. Nenninger | Grinding Machine | grinding machines |
| 1,993,830 | Mar. 12, 1935 | R.E. Conover | Grinding Machine | grinding machines |
| 2,006,554 | Jul. 02, 1935 | C. Herfurth | Grinding Machine | grinding machines |
| 2,042,257 | May 26, 1936 | C.W. Hopkins, R.E. Harrison | Machine Tool | grinding machines |
| 2,048,467 | Jul. 21, 1936 | E.G. Roehm | Grinding Machine | grinding machines |
| 2,049,611 | Aug. 04, 1936 | C.W. Hopkins, R.E. Harrison | Automatic Sizing Mechanism | grinding machines |
| 2,084,061 | Jun. 15, 1937 | H.E. Morton | Keyway Forming Machine | metal shapers |
| 2,378,903 | Jun. 26, 1945 | W.G. Baldenhofer | Grinding Machine | surface grinders |
| 2,633,678 | Apr. 07, 1953 | H.F. Smith | Machine Tool and Method of Operation | metalworking machine mechanisms |
