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All Patents of Type: drill press speed change accessories | |||||
Number | Date | Patentee | Title | Type | |
1,517,078 | Nov. 25, 1924 | R.R. Cummins, R.W. Kremer | Belt-Shifting Mechanism | drill press speed change accessories | |
2,073,704 | Mar. 16, 1937 | W.G. Mitchell | Drill press | drill press speed change accessories |