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All Patents in class 279/44 | |||||
Number | Date | Patentee | Title | Type | |
2,147,227 | Feb. 14, 1939 | G.B. Ambler | Drill sharpening machine | drill sharpening machines | |
3,185,492 | May 25, 1965 | H.R. Dziedzic | Tool Holding Means | metalworking machine mechanisms |