| All Patents in class 91/240 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 816,348 | Mar. 27, 1906 | J.W. Miller | Cylinder Compression Relief Valve | steam engine valves |
| 1,111,983 | Sep. 29, 1914 | L. Skinner, E.F. Williams | Automatic Exhaust Valve | steam engine valves |
| 1,145,177 | Jul. 06, 1915 | A.D. Baker | Engine | steam engines |
| 1,285,475 | Nov. 19, 1918 | W. Turnwald | Automatic exhaust-valve | steam engine valves |
| 2,000,553 | May 07, 1935 | C.R. Alden | Machine tool | horizontal boring mills |
| 3,464,315 | Sep. 02, 1969 | H.A. Weyer | Mechanical pneumatic servo control system for high-speed impact devices | drop hammers |
