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| All Patents in class 137/607 | |||||
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| Number | Date | Patentee | Title | Type | |
| 564,684 | Jul. 28, 1896 | E.N. Dickerson | Gas Mixing Device | carburetors | |
| 718,481 | Jan. 13, 1903 | A. Soames, W. Langdon-Davies | Internal Combustion Engine | internal combustion engine valves | |
| 2,381,146 | Aug. 07, 1945 | A. Von Wangenheim | Water Mixing Valve | valves | |