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| All Patents in class 251/322 | |||||
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| Number | Date | Patentee | Title | Type | |
| 17,433 | Jun. 02, 1857 | L.J. Knowles | Faucet | ||
| 188,154 | Mar. 06, 1877 | W.D. Leavitt, B.J. Thurston | Improvement in gas and water regulators | ||
| 256,229 | Apr. 11, 1882 | J.E. Lonergan | Oil-cup for steam-engines | oil cups | |
| 583,399 | May 25, 1897 | G.W. Lewis | Gas or Oil Vapor Engine | internal combustion engines | |