| All Patents in class 451/218 |
Patents 1 -
15
of 45
      |
| Number | Date | Patentee | Title | Type |
| 27,221 | Feb. 21, 1860 | C.W. Hubbard | Machine for grinding and polishing saws | saw sharpening machines |
| 256,440 | Apr. 11, 1882 | P. Medart | Machine for grinding pulleys | cylindrical grinders |
| 434,115 | Aug. 12, 1890 | C.H. Norton | Grinding Machine | grinders |
| 696,034 | Mar. 25, 1902 | C.R. Gabriel | Grinding-machine | grinders |
| 945,453 | Jan. 04, 1910 | B.M. Hanson | Mechanism for actuating cross-slides | metal lathes |
| 945,463 | Jan. 04, 1910 | A.B. Landis | Machine for grinding cutters and reamers | grinders |
| 956,208 | Apr. 26, 1910 | E.F. Smith | Grinding-machine | surface grinders |
| 1,535,452 | Apr. 28, 1925 | P. Conradson | Grinding Machine | internal grinders |
| 1,575,520 | Mar. 02, 1926 | W.D. Archea | Work Carrying Device for Grinding Machines | centerless grinders |
| 1,609,643 | Dec. 07, 1926 | L. Daly | Grinding Machine | grinding machines |
| 1,658,185 | Feb. 07, 1928 | R.L. Carter | Tool-grinding mechanism | woodworking machine sharpening mechanisms |
| 1,683,859 | Sep. 11, 1928 | F.P. Brown | Grinding machine | |
| 1,776,241 | Sep. 16, 1930 | F.S. Haas, J.E. Caster | Grinding Machinery | grinding machines |
| 1,862,851 | Jun. 14, 1932 | F.S. Haas | Grinding Machinery | grinding machines |
| 1,874,583 | Aug. 30, 1932 | L.F. Nenninger | Grinding Machinery | grinding machines |
