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| All Patents in class 91/310 | |||||
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| Number | Date | Patentee | Title | Type | |
| 54,090 | Apr. 24, 1866 | G.H. Babcock, S. Wilcox, Jr. | Improvement in cut-off valves | steam engine valves | |
| 183,446 | Oct. 17, 1876 | B. Brazelle | Improvement in variable cut-offs for direct-acting engines | steam engine valves | |
| 293,585 | Feb. 12, 1884 | F.D. Maltby | Oscillating Steam Pumping Engine | steam pumping engines | |
| 2,477,490 | Jul. 26, 1949 | J.M. Ferndale | Form Tool Planer | metal planers | |
| 2,573,368 | Oct. 30, 1951 | E.Y. Seborg | Reciprocatory drive for machine tools | ||