| All Patents in class 451/548 |
Patents 31 -
36
of 36
      |
| Number | Date | Patentee | Title | Type |
| 2,051,618 | Aug. 18, 1936 | F.C. Penny | Block for Sectional Grinding Wheels | grinders |
| 2,180,550 | Nov. 21, 1939 | J.M. Redinger | Mounting for a Grinding Wheel | grinder wheels |
| 2,282,912 | May 12, 1942 | E. Van der Pyl | Grinding Wheel | grinding wheels |
| 2,308,472 | Jan. 12, 1943 | J.A. Smith, II | Valve seat grinding device | |
| 2,810,239 | Oct. 22, 1957 | A.C. Burleigh | Holder for abrasive disk | handheld power sanders |
| 2,997,820 | Aug. 29, 1961 | E.C. Schacht | Organic bond abrasive wheel | grinding wheels |
