| All Patents in class 451/541 |
Patents 1 -
10
of 28
      |
| Picture | Number | Date | Patentee | Title |
 | 10,017 | Sep. 13, 1853 | J.M. Smith | Improved cutter-head for molding machines |
| | 110,102 | Dec. 13, 1870 | J.F. Wood | Improvement in the manufacture of emery-wheels |
 | 163,025 | May 11, 1875 | S.G. Morrison | Improvement in emery-wheels |
 | 201,778 | Mar. 26, 1878 | G. Hart | Emery Wheel |
| | 220,911 | Oct. 28, 1879 | L.D. Cogswell | Grinder |
| | 429,697 | Jun. 10, 1890 | C.H. Norton | Grinding Machine |
| | 449,217 | Mar. 31, 1891 | A.T. Good | Polishing Cone |
| | 494,471 | Mar. 28, 1893 | F.N. Gardner, C.H. Besly | Grinding or polishing wheel and the art of manufacturing same |
 | 646,397 | Mar. 27, 1900 | W.H. Thorne, J.S. Bancroft | Grinding-Machine |
 | 883,649 | Mar. 31, 1908 | A.B. Landis | Grinding-machine |
