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All Patents in class 192/83 | |||||
Number | Date | Patentee | Title | Type | |
660,249 | Oct. 23, 1900 | A.J. Gifford | Drilling-machine | drill presses | |
1,822,697 | Sep. 08, 1931 | P.R. Hahnemann | Sheet-metal working machine | beading machines | |
3,454,143 | Jul. 08, 1969 | H.L. Beam, W.A. Berube, G.A. Dobslaw | Power-operated tool | handheld power drills |