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| All Patents in class 470/104 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,006,532 | Oct. 24, 1911 | A. Casazza | Portable magnetic drill | |
| 1,613,369 | Jan. 04, 1927 | E.L. Worbois | Nut-Tapping Machine | ||