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| All Patents in class 251/319 | |||||
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| Number | Date | Patentee | Title | Type | |
| 248,728 | Oct. 25, 1881 | H.F. Frisbie | Puppet Valve | steam engine valves | |
| 439,349 | Oct. 28, 1890 | N.T. Greene | Slide-valve for steam-engines | steam engine valves | |
| 3,294,363 | Dec. 27, 1966 | J.M. Zeigler, E.F. Winkle | Diverter spout construction | oil cans | |