| All Patents in class 451/245 |
Patents 1 -
10
of 16
      |
| Picture | Number | Date | Patentee | Title |
| | 397,114 | Feb. 05, 1889 | N.H. Dolsen | Machine for removing bark from trees |
| | 398,243 | Feb. 19, 1889 | H. Ferguson | Machine for finishing poles or rods |
 | 980,052 | Dec. 27, 1910 | J. Hausman, J.C. Blevney | Grinding and polishing machine |
| | 1,281,366 | Oct. 15, 1918 | L.R. Heim | Method of Grinding Hardened Rolls |
| | 1,524,969 | Feb. 03, 1925 | L.F. Nenninger, S. Einstein | Centerless Grinding Machine |
| | 1,647,129 | Nov. 01, 1927 | L.R. Heim | Grinding |
| | 1,647,130 | Nov. 01, 1927 | L.R. Heim | Art of Grinding |
| | 1,647,131 | Nov. 01, 1927 | L.R. Heim | Grinding |
| | 1,691,061 | Nov. 13, 1928 | L.R. Heim | Grinding Device |
| | 1,772,544 | Aug. 12, 1930 | L.R. Heim | Truing Device for Abrasive Wheels Used in Producing Ground Articles |
