| All Patents in class 417/537 |
Patents 1 -
10
of 10
      |
| Picture | Number | Date | Patentee | Title |
 | 5,564X | Jul. 09, 1829 | R. Wileman | Pumps |
 | 6,274 | Apr. 03, 1849 | H.R. Worthington, W.H. Baker | Method of insuring the action of the valves in the direct-action pumping-engines |
| | 13,370 | Jul. 31, 1855 | H.R. Worthington | Direct-acting hydraulic steam-pump |
| | 31,314 | Feb. 05, 1861 | T. Hansbrow | Double Acting Pump |
 | 35,059 | Apr. 22, 1862 | J.W. Douglas | Double-acting hand pump |
| | 215,804 | May 27, 1879 | G.H. Corliss | Pumping-Engine |
| | 978,673 | Dec. 13, 1910 | J.M. Stratton | Double-acting horizontal power-pump |
| | 1,723,360 | Aug. 06, 1929 | E.P. Larsh | Pump |
 | 2,214,257 | Sep. 10, 1940 | E.M. Pfauser | Hydraulic Power Unit |
| | 2,348,412 | May 09, 1944 | E.M. Pfauser | Pump Assemblage |
