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| All Patents in class 174/209 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,675,419 | Jul. 03, 1928 | G.T. Pfleger | Process of insulating motor windings | motor windings | |
| 1,794,673 | Mar. 03, 1931 | F.L. Creager | Spark Plug Cover | ignition systems | |