| All Patents in class 91 |
Patents 16 -
30
of 806
      |
| Number | Date | Patentee | Title | Type |
| 5,765 | Sep. 12, 1848 | F.E. Sickels | Method of Controlling Motive Power | power hammers |
| 6,096 | Feb. 06, 1849 | I.L. Bennett | Piston-Valve Inclosed in the Steam-Cylinder | |
| 6,162 | Mar. 10, 1849 | G.H. Corliss | Cut-Off and Working the Valves of Steam Engines | steam engines |
| 6,324 | Apr. 17, 1849 | G. McKay | Piston-valve cut-off | steam check valves |
| 7,350 | May 07, 1850 | C. Richardson | Steam Engine Valve Gear | steam engine valve gear |
| 7,838 | Dec. 17, 1850 | S.H. Gilman | Expansion-Gear for Horizontal Engines | steam engine valve gear |
| RE200 | May 13, 1851 | G.H. Corliss | Improvements in Cut-Off and Working the Valves of Steam Engines | steam engines |
| 9,078 | Jun. 29, 1852 | H.R. Remsen, P.M. Hutton | Locomotive-Engine | railroad locomotives |
| 10,185 | Nov. 01, 1853 | L.R. Faught | Regulating the speed of steam-engines | |
| 10,276 | Nov. 29, 1853 | R.R. Taylor | Arrangement of valves, ports, and passages for operating steam-hammers | steam hammers |
| 10,398 | Jan. 03, 1854 | W. Wright | Operating Cut-Off Valves of Steam Engines | steam engine valves |
| 10,486 | Jan. 31, 1854 | P.L. Weimer | Steam Hammer | steam hammers |
| 10,647 | Mar. 14, 1854 | A. Taylor | Steam Engine Faucet-Valve | steam engine valves |
| 12,207 | Jan. 09, 1855 | W.C. Hicks | Arrangement of slide-valves and exhaust-passages in steam-engines | steam engine valves |
| 12,216 | Jan. 09, 1855 | J.A. Reed | Oscillating Steam Engine | oscillating steam engines |
