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| All Patents in class 91/456 | |||||
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| Number | Date | Patentee | Title | Type | |
| 271,729 | Feb. 06, 1883 | M.R. Moore | Oscillating Valve | steam engine valves | |
| 500,271 | Jun. 27, 1893 | F. Phillips | Valve for engines | ||
| 545,414 | Aug. 27, 1895 | J.W. Sargent | Exhaust Valve for Steam Engines | steam engine valves | |
| 651,502 | Jun. 12, 1900 | E.E. Fitzgerald | Sawmill Set-Works | sawmill set works | |
| 1,065,339 | Jun. 24, 1913 | B. Brazelle | Single-acting engine | pneumatic tools | |