| All Patents in class 91/325 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 46,470 | Feb. 21, 1865 | W.C. Hicks | Improvement in steam-engines | steam engines |
| 358,435 | Mar. 01, 1887 | G.E. Dow | Steam Engine | steam engines |
| 517,900 | Apr. 10, 1894 | N. Tesla | Steam-Engine | |
| 1,045,630 | Nov. 26, 1912 | J. Stumpf | Unidirectional-flow steam-engine | steam engines |
| 1,283,145 | Oct. 29, 1918 | J.C. Gaskill | Steam Engine | steam engines |
| 1,293,713 | Feb. 11, 1919 | H.A. Chuse | Steam Engine | steam engine valves |
| 1,650,642 | Nov. 29, 1927 | H.G. Mueller | Steam Engine | steam engines |
| 1,650,643 | Nov. 29, 1927 | H.G. Mueller | Steam Engine | steam engines |
| 1,668,927 | May 08, 1928 | J. Stumpf | Noncondensing steam engine | steam engines |
| 2,094,159 | Sep. 28, 1937 | H.G. Mueller | Valve Mechanism for Steam Engines | steam engine valve gear |
| 2,300,747 | Nov. 03, 1942 | E.C. Read | Steam engine | |
| 2,363,812 | Nov. 28, 1944 | J.L. Skinner | Engine Control Mechanism | steam engine governors |
| 3,057,417 | Oct. 09, 1962 | R.L. Sandvig | Drill system with suction removal of cuttings | |
