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| All Patents in class 91/183 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 9,078 | Jun. 29, 1852 | P.M. Hutton, H.R. Remsen | Locomotive-Engine | ||
| 28,242 | May 08, 1860 | J. Randall | Reciprocating Steam Engine | ||
| 90,128 | May 18, 1869 | P. Shaw | Hot Air Engine | ||
| 434,497 | Aug. 19, 1890 | J. Baird | Steam Engine | ||
| 778,315 | Dec. 27, 1904 | T.D. Ulrich, E. Huber | Superheater for Traction Engines | ||
| 2,951,342 | Sep. 06, 1960 | H.E. Boyer, N.V. Gusching, W.H. Ulman, D.E. Lundeen | Electro-hydraulic servo system | ||