| All Patents in class 137/625.22 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 7,353 | May 07, 1850 | T.C. Theaker | Improvement in Oscillating Valves of Steam Engines | steam engine valves |
| 25,248 | Aug. 30, 1859 | A. Crosby | Valve for steam-engines | steam engine valves |
| 72,750 | Dec. 31, 1867 | J.F. Morse | Improvement in steam-engine valves | steam engine valves |
| 114,078 | Apr. 25, 1871 | P.N. Woods | Improvement in valves and steam-chests for engines | |
| 166,758 | Aug. 17, 1875 | C.M. Farrar | Rotary Balanced Valve | steam engine valves |
| 257,871 | May 16, 1882 | J. Humphreys, Jr. | Pump | rotary pumps |
| 298,063 | May 06, 1884 | J.L. Bogert | Balanced rotary valve | steam engine valves |
| 873,963 | Dec. 17, 1907 | B.A. Slocum | Internal Combustion Engine | internal combustion engines |
| 1,446,547 | Feb. 27, 1923 | J.M. Crowe | Valve for pneumatic tools | pneumatic tools |
| 1,695,777 | Dec. 18, 1928 | R.A. Norling | Reversible drill throttle | |
| 4,658,859 | Apr. 21, 1987 | L.W. Durham, B.S. Backe | Valve Spool with Cross Drill Ports | |
