| All Patents in class 91/334 |
Patents 1 -
5
of 5
      |
| Number | Date | Patentee | Title | Type |
| 195,804 | Oct. 02, 1877 | A. Cunningham | Auromatic Expansion Gearing for Steam Engines | steam engine governors |
| 540,757 | Jun. 11, 1895 | F.W. Ofeldt | Vapor Engine | internal combustion engines |
| 630,767 | Aug. 08, 1899 | C.H. Beadle | Rotary Distributing Valve | steam engine valves |
| 1,036,058 | Aug. 20, 1912 | A.D. Baker | Reversible Variable Cut-Off Valve Gear for Locomotives | steam engine valve gear |
| 1,425,631 | Aug. 15, 1922 | H.C. Clay | Valve Gear Mechanism | traction engine valve gear |
