| All Patents in class 451/218 |
Patents 16 -
30
of 41
      |
| Number | Date | Patentee | Title | Type |
| 1,897,035 | Feb. 14, 1933 | C.J. Anderson | Grinding machine | sharpening machines |
| 1,924,608 | Aug. 29, 1933 | H.R. Isler | Cutter Grinder | tool grinders |
| 1,938,759 | Dec. 12, 1933 | H. Ernst | Grinding Machine | grinding machines |
| 1,938,762 | Dec. 12, 1933 | F.S. Haas | Grinding Machine | cylindrical grinders |
| 1,976,122 | Oct. 09, 1934 | F.S. Haas | Hydraulic Drive for Grinding Machines | grinding machines |
| 1,978,110 | Oct. 23, 1934 | B.A. Kearns | Grinding Machinery | grinding machines |
| 1,993,840 | Mar. 12, 1935 | C. Herfurth | Grinding Machine | grinding machines |
| 2,023,720 | Dec. 10, 1935 | H.H. Asbridge | Centerless grinding machine | |
| 2,033,335 | Mar. 10, 1936 | B.A. Kearns, F.S. Haas | Grinding Machine | grinding machines |
| 2,035,163 | Mar. 24, 1936 | K.W. Holmberg | Tool Holder and Guide | sharpening tool holders |
| 2,063,659 | Dec. 08, 1936 | C. Booth, J.E. Caster | Internal Grinding Fixture | grinding machines |
| 2,069,493 | Feb. 02, 1937 | W.H. Howe | Carriage Traversing Mechanism | machine tool controls |
| 2,136,188 | Nov. 08, 1938 | L. Spraker, G.R. Gagne | Valve Refacing Device | valve grinding tools |
| 2,141,065 | Dec. 20, 1938 | W. Trible, F.S. Haas | Grinding Machine | grinding machines |
| 2,141,853 | Dec. 27, 1938 | C.E. Brown | Grinding Machine | grinding machines |
