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| All Patents in class 336/198 | |||||
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| Number | Date | Patentee | Title | Type | |
| 422,746 | Mar. 04, 1890 | M. von Dolivo-Dobrowolsky | Electric induction apparatus or transformer | electric distribution systems | |
| 2,872,599 | Feb. 03, 1959 | R.E. De Young | Winding insulator for electric motor | electric motors | |