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| All Patents in class 81/124.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,919,020 | Apr. 24, 1990 | D.A. Huebschen | Spring-Loaded Magnetic Driver and Method of Assembly Thereof | ||
| 5,163,345 | Nov. 17, 1992 | S.W. Predny, J.T. Doan | Spring-Loaded Magnetic Driver and Method of Assembly Thereof | ||