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| All Patents in class 192/83 | |||||
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| Number | Date | Patentee | Title | Type | |
| 660,249 | Oct. 23, 1900 | A.J. Gifford | Drilling-machine | drill presses | |
| 3,454,143 | Jul. 08, 1969 | H.L. Beam, W.A. Berube, G.A. Dobslaw | Power-operated tool | handheld power drills | |