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All Patents in class 106/685
Patents 1 - 4 of 4
First set of recordsLast set of records
53,092Mar. 06, 1866S. SorelMaterial for making grinding wheels
100,944Mar. 15, 1870S. SorrelMaterial for making grinding wheels
100,945Mar. 15, 1870S. SorrelMaterial for making grinding wheels
124,559Mar. 12, 1872J.S. Elliott, J.F. WoodImprovement in processes of repairing millstones
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