| All Patents in class 451/1 |
Patents 1 -
15
of 55
      |
| Number | Date | Patentee | Title | Type |
| 8,224X | May 28, 1834 | J. Wheaton | Elliptical Spindle Grinder | grinders |
| 553,828 | Feb. 04, 1896 | C.W. Blood | Grinding-machine | |
| 781,434 | Jan. 31, 1905 | A.B. Landis | Automatic sizing mechanism for grinding-machines | grinders |
| 1,535,080 | Apr. 21, 1925 | H.K. Spencer | Means For Controlling Feeding Mechanisms | surface grinders |
| 1,772,932 | Aug. 12, 1930 | S. Einstein | Grinding Machinery | grinding machines |
| 1,862,851 | Jun. 14, 1932 | F.S. Haas | Grinding Machinery | grinding machines |
| 1,864,589 | Jun. 28, 1932 | H. Ernst | Grinding Machinery | grinding machines |
| 1,891,662 | Dec. 20, 1932 | F.S. Haas, C. Booth | Machine Tool | grinding machines |
| 1,926,603 | Sep. 12, 1933 | B.F. Stowell | Automatic feed for grinding machines | grinders |
| 1,945,044 | Jan. 30, 1934 | W.M. Fairbairn, A.M. Johnson | Honing machine | honing machines |
| 1,945,045 | Jan. 30, 1934 | A.M. Johnson | Honing machine | honing machines |
| 1,954,442 | Apr. 10, 1934 | H. Ernst, A.H. Dall | Grinding Machine | grinding machines |
| 1,991,953 | Feb. 19, 1935 | L.F. Nenninger | Grinding Machine | grinding machines |
| 1,993,830 | Mar. 12, 1935 | R.E. Conover | Grinding Machine | grinding machines |
| 2,033,335 | Mar. 10, 1936 | B.A. Kearns, F.S. Haas | Grinding Machine | grinding machines |
