| All Patents in class 451/340 |
Patents 31 -
45
of 59
      |
| Number | Date | Patentee | Title | Type |
| 1,749,328 | Mar. 04, 1930 | A. Turner, S. Einstein | Dead-Center Grinder | grinding machines |
| 1,778,452 | Oct. 14, 1930 | H. Ernst | Grinding Machinery | grinding machines |
| 1,831,382 | Nov. 10, 1931 | E. Gairing | Full Floating Universal Tool Holder | drilling and boring tool holders |
| 1,834,627 | Dec. 01, 1931 | B. Lundgreen | Spindle Mounting | grinding machines |
| 1,927,007 | Sep. 12, 1933 | J.R. Whittles | Grinding machine | |
| 1,986,520 | Jan. 01, 1935 | D.S. Oakley | Sanding machine | belt sanders |
| 2,010,557 | Aug. 06, 1935 | W. Peasler, L.F. Nenninger | Machine Tool Structure | grinding machines |
| 2,020,157 | Nov. 05, 1935 | H.L. Myers | Abrading shaft mounting | sanding machines |
| 2,028,487 | Jan. 21, 1936 | H.H. Asbridge | Spindle bearing | |
| 2,033,395 | Mar. 10, 1936 | W. Peaslee | Machine Tool | grinding machines |
| 2,072,814 | Mar. 02, 1937 | F.S. Haas | Grinding Machinery | grinding machines |
| 2,152,729 | Apr. 04, 1939 | C.C. Chartier | Universal Tool Sharpening and Work Holder | sharpening tool holders |
| 2,155,072 | Apr. 18, 1939 | H.W. Zimmerman | Machine for sizing and finishing bores | boring and turning machines |
| 2,164,212 | Jun. 27, 1939 | R.K. Blond | Attachment for cutter grinders | tool grinders |
| 2,182,231 | Dec. 05, 1939 | R.K. Blond | Attachment for cutter grinders | tool grinders |
