| All Patents in class 451/140 |
Patents 1 -
10
of 19
      |
| Picture | Number | Date | Patentee | Title |
 | 76,301 | Apr. 07, 1868 | E. Carrington, E.O. Carrington | Improvement in Machine for Grinding and Cutting Down Augers |
| | 293,398 | Feb. 12, 1884 | W.P. Barclay | Abrading Tool |
 | 492,095 | Feb. 21, 1893 | P. Medart | Machine for grinding pulley-shafts and their couplings |
| | 513,632 | Jan. 30, 1894 | R. Conrader | Machine for Grinding Spherical or Other Curved Surfaces |
| | 667,321 | Feb. 05, 1901 | M.L. Keyes | Edge Tool Grinder |
 | 1,683,859 | Sep. 11, 1928 | F.P. Brown | Grinding machine |
| | 1,772,932 | Aug. 12, 1930 | S. Einstein | Grinding Machinery |
 | 1,847,045 | Feb. 23, 1932 | W.H. Evans | Reamer sharpening machine |
| | 1,891,663 | Dec. 20, 1932 | C. Booth | Grinding Machinery |
| | 1,904,642 | Apr. 18, 1933 | C.G. Hunt | Grinding Machine |
