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| All Patents in class 51/297 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 187,593 | Feb. 20, 1877 | A.A. Sanborn, I.P. Brown, Jr. | Emery Grinding Wheels | ||
 | 581,787 | May 04, 1897 | G. Stickley | Sandpapering-wheel | |
| 3,116,986 | Jan. 07, 1964 | E.C. Johns, G.J. Geopfert | Method of Making Cold-Molded Abrasive Wheel | ||
| 3,972,161 | Aug. 03, 1976 | M.H. Zoiss | Solid abrading tool with fiber abrasive | ||
| 4,240,232 | Dec. 23, 1980 | J.C. Chwae | Coated Abrasive Superfinishing Stone and Method of Making Same | ||