| All Patents in class 451/294 |
Patents 61 -
75
of 106
      |
| Number | Date | Patentee | Title | Type |
| 1,800,307 | Apr. 14, 1931 | W.A. Marschke, F.W. Marschke | Swing grinder | |
| 1,814,209 | Jul. 14, 1931 | S. Einstein | Centerless Grinding Machine | grinding machines |
| 1,857,905 | May 10, 1932 | C.G. Wilderson | Control mechanism | woodworking machine mechanisms |
| 1,896,481 | Feb. 07, 1933 | R.A. Cole | Centerless Grinding Machine | grinding machines |
| 1,911,857 | May 30, 1933 | W. Stumpf | Grinder speed control | |
| 1,923,760 | Aug. 22, 1933 | J.A. Smith | Grinding machine | bench or pedestal grinders |
| 1,928,637 | Oct. 03, 1933 | R.A. Williams | Brake for woodworking machines | sanding machines |
| 1,938,723 | Dec. 12, 1933 | E. Ritz, Jr. | Grinding machine | bench or pedestal grinders |
| 1,938,765 | Dec. 12, 1933 | F.S. Haas | Grinding Machine | grinding machines |
| 1,965,235 | Jul. 03, 1934 | F.S. Haas | Grinding Machine | grinding machines |
| 1,976,119 | Oct. 09, 1934 | S. Einstein | Grinding Machine | grinding machines |
| 1,976,130 | Oct. 09, 1934 | F.S. Haas, B.A. Kearns | Grinding Machine | grinding machines |
| 1,982,483 | Nov. 27, 1934 | E. Ritz, Jr. | Grinding machine | bench or pedestal grinders |
| 1,993,840 | Mar. 12, 1935 | C. Herfurth | Grinding Machine | grinding machines |
| 2,003,495 | Jun. 04, 1935 | E. Ritz, Jr. | Grinding machine | bench or pedestal grinders |
