| All Patents in class 451/335 |
Patents 16 -
30
of 39
      |
| Number | Date | Patentee | Title | Type |
| 1,814,363 | Jul. 14, 1931 | C. Booth | Grinding Machinery | grinding machines |
| 1,816,170 | Jul. 28, 1931 | C. Booth | Grinding Machinery | grinding machines |
| 1,828,387 | Oct. 20, 1931 | C. Booth | Grinding Machine | grinding machines |
| 1,835,591 | Dec. 08, 1931 | E.P. Bullard | Automatic Work Feeding and Chucking Means for Multiple Spindle Lathes | |
| 1,847,466 | Mar. 01, 1932 | G.W. Binns | Grinding Machinery | grinding machines |
| 1,847,588 | Mar. 01, 1932 | C. Booth | Grinding Machine | grinding machines |
| 1,862,882 | Jun. 14, 1932 | J.E. Caster | Grinding Machinery | grinding machines |
| 1,864,589 | Jun. 28, 1932 | H. Ernst | Grinding Machinery | grinding machines |
| 1,871,866 | Aug. 16, 1932 | G.A. Volz | Grinding Machinery | grinding machines |
| 1,904,642 | Apr. 18, 1933 | C.G. Hunt | Grinding Machine | grinding machines |
| 1,993,822 | Mar. 12, 1935 | F.S. Haas, R.E. Harrison, G.W. Binns, S.E. Bergstrum | Grinding Machine | grinding machines |
| 1,997,551 | Apr. 09, 1935 | M. Romaine | Grinding Machine | grinding machines |
| 2,002,489 | May 28, 1935 | C. Booth, A. Strom | Grinding Machine | grinding machines |
| 2,025,714 | Dec. 31, 1935 | G.W. Binns | Grinding Machine | grinding machines |
| 2,033,449 | Mar. 10, 1936 | E.G. Roehm, M. Romaine | Machine Tool Mechanism | grinding machines |
