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| All Patents in class 239/409 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,260,500 | Mar. 26, 1918 | A. Winton | Mixing and Admission Valve Structure for Internal Combustion Motors | valve gear | |
| 1,400,328 | Dec. 13, 1921 | C.G. Sprado | Internal Combustion Engine | ||