| All Patents in class 91/12 |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| 35,174 | May 06, 1862 | J.H. Redstone, A.E. Redstone | Improvement in valves for steam-engines | |
| 46,470 | Feb. 21, 1865 | W.C. Hicks | Improvement in steam-engines | steam engines |
| 206,555 | Jul. 30, 1878 | F. Gardner | Steam Engine | steam engines |
| 313,728 | Mar. 10, 1885 | D.D. Hardy | Steam Engine | steam engines |
| 871,086 | Nov. 12, 1907 | W.O. Duntley, G.H. Hayes | Engine | pneumatic tools |
| 1,566,095 | Dec. 15, 1925 | F.A. Jimerson | Fluid-actuated rotary machine | pneumatic tools |
| 1,566,096 | Dec. 15, 1925 | F.A. Jimerson | Reversible throttle handle | pneumatic tools |
| 1,566,170 | Dec. 15, 1925 | C.W. Soule, Executor, C.G. Soule, Executor, G.W. Soule, deceased (Estate of) | Steam engine | steam engines |
| 2,051,052 | Aug. 18, 1936 | E.K. Morgan | Machine Tool Hydraulic Control System | hydraulic apparatus |
