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| All Patents in class 91/338 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | AI82 | Apr. 24, 1847 | J. Nasmyth | Machinery or apparatus operated by steam for forging, stamping, and cutting iron and other substances | |
 | 13,276 | Jul. 17, 1855 | A. Ferguson, J.B. Stott | Cross-Head Attachment for Working Steam-Engine Valves | |
 | 17,914 | Aug. 04, 1857 | R. Brayton | Nut Machine | |
| 195,804 | Oct. 02, 1877 | A. Cunningham | Auromatic Expansion Gearing for Steam Engines | ||
| 359,926 | Mar. 22, 1887 | W.S. Halsey | Steam Engine | ||