| All Patents in class 451/1 |
Patents 1 -
10
of 60
      |
| Picture | Number | Date | Patentee | Title |
 | 8,224X | May 28, 1834 | J. Wheaton | Elliptical Spindle Grinder |
 | 553,828 | Feb. 04, 1896 | C.W. Blood | Grinding-machine |
 | 781,434 | Jan. 31, 1905 | A.B. Landis | Automatic sizing mechanism for grinding-machines |
| | 1,535,080 | Apr. 21, 1925 | H.K. Spencer | Means For Controlling Feeding Mechanisms |
| | 1,772,932 | Aug. 12, 1930 | S. Einstein | Grinding Machinery |
| | 1,862,851 | Jun. 14, 1932 | F.S. Haas | Grinding Machinery |
| | 1,864,589 | Jun. 28, 1932 | H. Ernst | Grinding Machinery |
 | 1,866,212 | Jul. 05, 1932 | F.E. Stratton, G.T. Huxford | Grinding machine |
| | 1,891,662 | Dec. 20, 1932 | F.S. Haas, C. Booth | Machine Tool |
 | 1,926,603 | Sep. 12, 1933 | B.F. Stowell | Automatic feed for grinding machines |
