| All Patents in class 137/625.47 |
Patents 1 -
8
of 8
      |
| Picture | Number | Date | Patentee | Title |
 | 257,871 | May 16, 1882 | J. Humphreys, Jr. | Pump |
 | 477,295 | Jun. 21, 1892 | J.A. Charter | Gas Engine |
| | 564,500 | Jul. 21, 1896 | E.A. Benedict, C. Benedict | Spraying-nozzle |
| | 989,009 | Apr. 11, 1911 | C.L. Heisler | Cylinder Drain Cock Operating Mechanism |
| | 1,781,416 | Nov. 11, 1930 | G.D. Sundstrand | Pump |
| | 1,870,499 | Aug. 09, 1932 | W. Ernst | Hydraulically Operated Drop Hammer |
| | 2,972,357 | Feb. 21, 1961 | C.S. Gladoske, R.L. Ford | Hydraulic Rotary Selector Valve |
| | 4,658,859 | Apr. 21, 1987 | L.W. Durham, B.S. Backe | Valve Spool with Cross Drill Ports |
