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| All Patents in class 106/685 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 53,092 | Mar. 06, 1866 | S. Sorel | Material for making grinding wheels | ||
| 100,944 | Mar. 15, 1870 | S. Sorrel | Material for making grinding wheels | ||
| 100,945 | Mar. 15, 1870 | S. Sorrel | Material for making grinding wheels | ||
| 124,559 | Mar. 12, 1872 | J.S. Elliott, J.F. Wood | Improvement in processes of repairing millstones | ||