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| All Patents in class D13/183 | |||||
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| Number | Date | Patentee | Title | Type | |
| D19,896 | Jun. 10, 1890 | E. Weston | Magnet | electrical measuring apparatus | |
| D24,966 | Dec. 10, 1895 | D.C. Jackson, C.M. Conradson | Frame for Field Magnets | motor housings | |