| All Patents in class 51/293 |
Patents 1 -
15
of 16
      |
| Number | Date | Patentee | Title | Type |
| 8,246X | Jun. 14, 1834 | I. Fischer, Jr. | Manufacturing sandpaper | sanding machines |
| 88,725 | Apr. 06, 1869 | C. Marsh | Improved Mode of Finishing and Truing Emery Wheels, &c. | wheel truing devices |
| 124,559 | Mar. 12, 1872 | J.S. Elliott, J.F. Wood | Improvement in processes of repairing millstones | |
| 257,612 | May 09, 1882 | J. Renshaw | Method of Revivifying Abrading-Surfaces | sharpening machines |
| 467,254 | Jan. 19, 1892 | S.G. Hodges | Method of forming emery-wheels | grinding wheels |
| 494,471 | Mar. 28, 1893 | F.N. Gardner, C.H. Besly | Grinding or polishing wheel and the art of manufacturing same | |
| 494,472 | Mar. 28, 1893 | F.N. Gardner, C.H. Besly | Grinding or polishing wheel and the art of manufacturing same | |
| 1,126,423 | Jan. 26, 1915 | C.H. Driver | Sandpaper belting | abrasives and holders |
| 1,499,094 | Jun. 24, 1924 | L.T. Medholdt, C.W. Blood | Method of grinding cutters | cutter grinding |
| 2,282,912 | May 12, 1942 | E. Van der Pyl | Grinding Wheel | grinding wheels |
| 2,523,698 | Sep. 26, 1950 | F.E. Hawley | Method of Making Diamond Loaded Abrasive Articles | wheel truing devices |
| 2,606,405 | Aug. 12, 1952 | R.S. Ohl | Polishing Means and Method | polishing and buffing machinery |
| 2,943,926 | Jul. 05, 1960 | G.J. Goepfert | Abrasive Wheel Composition | grinder wheels |
| 3,116,986 | Jan. 07, 1964 | E.C. Johns, G.J. Geopfert | Method of Making Cold-Molded Abrasive Wheel | grinder wheels |
| 3,551,125 | Dec. 29, 1970 | R.T. Hallewell | Method of forming a grinding wheel | grinding wheels |
