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| All Patents in class 137/601.13 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,850,690 | Mar. 22, 1932 | S.B. Redfield | Retaining device for plate valves | air compressors | |
| 2,461,328 | Feb. 08, 1949 | W.S. Landon | Controlling Means and System | flow controls | |
| 2,843,148 | Jul. 15, 1958 | A.W. Rymills | Soft closing nozzle valve | locomotive diesel fuel apparatus | |
| 3,610,274 | Oct. 05, 1971 | A. Hirt, G.N. Levesque | Fluid Logic Circuit | ||