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| All Patents in class 137/505.26 | |||||
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| Number | Date | Patentee | Title | Type | |
| 306,314 | Oct. 07, 1884 | C.G. Beechey | Gas Regulating Valve for Gas Engines | internal combustion engine valves | |
| 2,335,824 | Nov. 30, 1943 | E.J. Dillman | Valve | valves | |