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| All Patents in class 261/103 | |||||
| Number | Date | Patentee | Title | Type | |
| 839,617 | Dec. 25, 1906 | S.S. Morton | Cooler for Explosive Engines | cooling apparatus | |
| 1,750,047 | Mar. 11, 1930 | G.A. Metzger | Air-cooling apparatus | ||