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| All Patents in class 192/81C | |||||
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| Number | Date | Patentee | Title | Type | |
| 78,183 | May 26, 1868 | W.C. Burch | Improved hand-drill | hand drills | |
| 134,355 | Dec. 31, 1872 | W.C. Burch | Drills for Drilling Metals | ratchet drills | |
| 933,866 | Sep. 14, 1909 | H.E. Frentzel, H. WEickel | Load Brake | hoists, winches, come-alongs | |
| 973,135 | Oct. 18, 1910 | A.B. Nutting | Buffing and polishing machine | bench or pedestal grinders | |
| 2,105,330 | Jan. 11, 1938 | W.H. Pagenkopf | Tool Holder | metalworking machine tool holders | |