| All Patents in class 451/340 |
Patents 1 -
10
of 69
      |
| Picture | Number | Date | Patentee | Title |
 | 16,782 | Mar. 10, 1857 | E. Andrews | Machine for grinding saws |
 | 112,838 | Mar. 21, 1871 | J.L. Otis | Improvement in machines for grinding saw-teeth |
 | 158,172 | Dec. 29, 1874 | C.H. Hill, A.W. Proctor | Improvement in machine for grinding knives |
 | 217,795 | Jul. 22, 1879 | P.B. Hillyer | Combined Forge, Emery Wheel and Drill |
| | 230,715 | Aug. 03, 1880 | I.L. Penney | Grinding Twist Drills |
 | 417,615 | Dec. 17, 1889 | A. Webster | Machine for Grinding Lathe Beds |
 | 439,154 | Oct. 28, 1890 | F. Holz | Cutter Grinder |
| | 470,497 | Mar. 08, 1892 | W.S. Loveland, E.C. Henn | Journal |
 | 521,836 | Jun. 26, 1894 | O.S. Walker | Bearing for emery-wheels |
| | 614,247 | Nov. 15, 1898 | H. Goldsmith, E.T. Goodhew | Grinding Machine |
