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| All Patents in class 137/606 | |||||
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| Number | Date | Patentee | Title | Type | |
| 284,556 | Sep. 04, 1883 | G.M. Hopkins | Gas Engine | gas and gasoline engines | |
| 616,974 | Jan. 03, 1899 | C.C. Riotte | Gas Engine | gas and gasoline engines | |
| 846,213 | Mar. 05, 1907 | L. Kassander | Boiler Check Valve | feedwater apparatus | |
| 1,109,682 | Sep. 08, 1914 | L. Kassander | Jet Pump Apparatus | steam pumps | |
| 1,693,109 | Nov. 27, 1928 | W. Ernst | Semiautomatic Valve | hydraulic valves | |