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| All Patents in class 81/34 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,732,613 | Oct. 22, 1929 | W.J. Parsons | Tool and frame | eggbeater drills | |
| 1,770,884 | Jul. 15, 1930 | F.E. Farley | Breast drill | breast drills | |
| 2,902,773 | Sep. 08, 1959 | E.C. Dudek | Paintbrush spinner | ||