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| All Patents in class 137/636.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,271,157 | Jul. 02, 1918 | W.B. Gorr | Compensating Valve Gear | steam engine valve gear | |
| 1,656,573 | Jan. 17, 1928 | A.D. Skinner | Engine Valve Gear | steam engine valve gear | |
| 1,693,109 | Nov. 27, 1928 | W. Ernst | Semiautomatic Valve | hydraulic valves | |
| 2,441,339 | May 11, 1948 | S.A. Rivington | Hydraulic system | ||
| 2,730,129 | Jan. 10, 1956 | H. Fritschi, A.H. Dall | Tracer Control Mechanism | ||