| All Patents in class 451 |
Patents 2161 -
2175
of 3611
      |
| Number | Date | Patentee | Title | Type |
| 1,938,493 | Dec. 05, 1933 | H.L. Myers | Abradant driving head | sanding machines |
| 1,938,548 | Dec. 05, 1933 | H.E. Tautz | Machine table extension | tablesaws |
| 1,938,723 | Dec. 12, 1933 | E. Ritz, Jr. | Grinding machine | bench or pedestal grinders |
| 1,938,756 | Dec. 12, 1933 | C. Booth | Grinding Machine | grinding machines |
| 1,938,757 | Dec. 12, 1933 | F.S. Haas, S. Einstein | Grinding Machine | grinding machines |
| 1,938,758 | Dec. 12, 1933 | H. Ernst | Spindle Oscillator | grinding machines |
| 1,938,759 | Dec. 12, 1933 | H. Ernst | Grinding Machine | grinding machines |
| 1,938,760 | Dec. 12, 1933 | H. Fritschi | Grinding Machine | grinding machines |
| 1,938,762 | Dec. 12, 1933 | F.S. Haas | Grinding Machine | cylindrical grinders |
| 1,938,763 | Dec. 12, 1933 | F.S. Haas | Grinding Machinery | grinding machines |
| 1,938,764 | Dec. 12, 1933 | H. Fritschi, F.S. Haas | Grinding Machine | grinding machines |
| 1,938,765 | Dec. 12, 1933 | F.S. Haas | Grinding Machine | grinding machines |
| 1,938,766 | Dec. 12, 1933 | C.W. Hopkins | Grinding Machine | grinding machines |
| 1,938,767 | Dec. 12, 1933 | B.A. Kearns | Grinding Machine | cylindrical grinders |
| 1,939,111 | Dec. 12, 1933 | A.N. Emmons | Abrading machine | sanding machines |
