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| All Patents in class 137/517 | |||||
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| Number | Date | Patentee | Title | Type | |
| 266,462 | Oct. 24, 1882 | H. Hobbs, E.F. Gordon | Vent-valve | steam heating | |
| 861,714 | Jul. 30, 1907 | H.C. Dudgeon | Hydraulic jack | hydraulic jacks | |
| 1,298,068 | Mar. 25, 1919 | B.T. McCanna, E.R. Klemm | Gas-engine governor and auxiliary air-inlet | internal combustion engine governors | |
| 1,597,729 | Aug. 31, 1926 | W.W. Schettler | Safety Device for Preventing Passage of Flame | internal combustion engines | |