| All Patents in class 451/406 |
Patents 1 -
10
of 35
      |
| Picture | Number | Date | Patentee | Title |
 | 81,611 | Sep. 01, 1868 | J.W. Douglas | Grindstone Frame |
 | 98,028 | Dec. 21, 1869 | J. Dickinson, E.D. Dickinson, G.T. Chattaway | Grinding Machine |
 | 105,392 | Jul. 12, 1870 | W.L. Washburn | Grinding Apparatus |
 | 114,098 | Apr. 25, 1871 | S. Bevan | Saw polishing machine |
 | 134,363 | Dec. 31, 1872 | G.L. Cummings | Improvement in grindstone-frames |
 | 261,848 | Aug. 01, 1882 | B.H. Hadley | Emery Grinder |
 | 403,521 | May 21, 1889 | E. Cutlan | Tool for spiral turning |
 | 407,577 | Jul. 23, 1889 | J.D. Cox, Jr. | Machine for back-clearing twist-drills |
| | 418,977 | Jan. 07, 1890 | C.E. Forry | Machine for Grinding Lawn Mower Knives |
 | 427,091 | May 06, 1890 | A.B. Landis | Grinding-machine |
