| All Patents in class 451/121 |
Patents 1 -
10
of 21
      |
| Picture | Number | Date | Patentee | Title |
 | 151,669 | Jun. 02, 1874 | M. Newman | Improvement in metal shaping and dressing machines |
 | 487,140 | Nov. 29, 1892 | C.A. Worden | Machine for sharpening razors |
 | 516,146 | Mar. 06, 1894 | C.A. Worden | Machine for sharpening razors, shears, &c. |
 | 856,662 | Jun. 11, 1907 | G.W. Smith | Face-mill grinder |
| | 1,026,022 | May 14, 1912 | W.F. Cremean | Grinding Machine |
| | 1,039,075 | Sep. 17, 1912 | G.W. Smith | Face-Mill Grinder |
| | 1,212,214 | Jan. 16, 1917 | J. Halterbeck | Abrading-machine |
| | 1,281,512 | Oct. 15, 1918 | J.A. Carothers | Saw Grinding Machine |
| | 1,780,886 | Nov. 04, 1930 | J.F. Pribnow, E.F. Mitchell | Circular-saw-sharpening machine |
| | 1,849,868 | Mar. 15, 1932 | S. Einstein | Grinder Wheel Oscillator |
