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All Patents in class 451/442 | |||||
Number | Date | Patentee | Title | Type | |
2,162,038 | Jun. 13, 1939 | W. Trible | Grinding Machine | grinding machines | |
2,178,875 | Nov. 07, 1939 | B.A. Kearns | Continuous Truing Mechanism | grinding machines | |
2,184,011 | Dec. 19, 1939 | R.E. Flanders | Grinding Machine | grinder dressers |