| All Patents in class 451/915 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 110,102 | Dec. 13, 1870 | J.F. Wood | Improvement in the manufacture of emery-wheels | |
| 125,949 | Apr. 23, 1872 | A.S. Gear | Improvement in machines for working stone | |
| 1,261,669 | Apr. 02, 1918 | W.E. Wright | Sawing Apparatus | |
| 1,290,896 | Jan. 14, 1919 | W.L. Bryant | Machine for grinding metal | cylindrical grinders |
| 1,323,452 | Dec. 02, 1919 | S.A. Cogsdill | Machine for Grinding Tools | tool grinders |
| 1,911,857 | May 30, 1933 | W. Stumpf | Grinder speed control | |
| 1,923,760 | Aug. 22, 1933 | J.A. Smith | Grinding machine | bench or pedestal grinders |
