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| All Patents in class 192/81C | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 78,183 | May 26, 1868 | W.C. Burch | Improved hand-drill | |
| 134,355 | Dec. 31, 1872 | W.C. Burch | Drills for Drilling Metals | ||
| 933,866 | Sep. 14, 1909 | H.E. Frentzel, H. Weickel | Load Brake | ||
| 973,135 | Oct. 18, 1910 | A.B. Nutting | Buffing and polishing machine | ||
| 1,661,652 | Mar. 06, 1928 | G.A. Carlson | Automobile window mechanism | ||
| 2,105,330 | Jan. 11, 1938 | W.H. Pagenkopf | Tool Holder | ||