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| All Patents in class 51/303 | |||||
| Picture | Number | Date | Patentee | Title | |
| 187,593 | Feb. 20, 1877 | A.A. Sanborn, I.P. Brown, Jr. | Emery Grinding Wheels | ||
![]() | 608,877 | Aug. 09, 1898 | D.J. Lattimore | Abrading-wheel | |
![]() | 1,094,361 | Apr. 21, 1914 | J.C. Blevney | Polishing device | |