| All Patents in class 451/283 |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
| | 8,706X | Mar. 24, 1835 | P. Cooper | Grinding and polishing stone, glass, etc. |
| | 282,761 | Aug. 07, 1883 | J.T. Obenchain | Machine for Facing Millstones |
 | 492,095 | Feb. 21, 1893 | P. Medart | Machine for grinding pulley-shafts and their couplings |
| | 1,264,129 | Apr. 23, 1918 | M.O. Reeves | Grinding Machine |
| | 1,904,642 | Apr. 18, 1933 | C.G. Hunt | Grinding Machine |
| | 2,010,359 | Aug. 06, 1935 | F.S. Haas | Grinding Machine |
| | 2,025,714 | Dec. 31, 1935 | G.W. Binns | Grinding Machine |
| | 2,059,724 | Nov. 03, 1936 | G.A. Carlson | Finishing machine |
 | 2,136,188 | Nov. 08, 1938 | L. Spraker, G.R. Gagne | Valve Refacing Device |
