| All Patents in class 451/443 |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
| | 282,760 | Aug. 07, 1883 | J.T. Obenchain | Machine for Dressing Millstones |
 | 883,650 | Mar. 31, 1908 | A.B. Landis | Grinding-wheel truer for grinding-machines |
| | 1,905,224 | Apr. 25, 1933 | C. Booth, F.S. Haas | Grinding Machinery |
| | 1,965,261 | Jul. 03, 1934 | C.L. Schulte | Grinding Machine |
| | 1,972,826 | Sep. 04, 1934 | F.S. Haas | Grinding Machine |
| | 2,130,711 | Sep. 20, 1938 | H.H. Asbridge | Grinding wheel truing device |
| | RE23,937 | Feb. 08, 1955 | B.B. Green, executrix, E.J. Bullard, deceased (estate of) | Lapping Machine |
