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| All Patents in class 91/454 | |||||
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| Number | Date | Patentee | Title | Type | |
| 198,099 | Dec. 11, 1877 | H.F. Frisbie | Steam-Engine Cylinder | steam engine cylinders | |
| 518,197 | Apr. 10, 1894 | A.J. Moxham | Machine for Straightening Rails or Other Metal Bars | metalworking machines | |
| 2,778,342 | Jan. 22, 1957 | H.W. Ringman | Poppet type valve distributing system for a servo-motor | ||