| All Patents in class 417/443 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 27,128 | Feb. 14, 1860 | B. Holly | Pump Lift | pumps |
| 120,325 | Oct. 24, 1871 | A.K. Rider | Improvement in Air Engines | hot air engines |
| 137,765 | Apr. 15, 1873 | R. Dudgeon | Improvement in hydraulic jacks | hydraulic jacks |
| 162,044 | Apr. 13, 1875 | E.M. Dudgeon | Improvement in hydraulic jacks | hydraulic jacks |
| 302,070 | Jul. 15, 1884 | T.H. Watson | Hydraulic jack | hydraulic jacks |
| 861,213 | Jul. 23, 1907 | T.H. Homersham | Pump | piston pumps |
| 2,481,183 | Sep. 06, 1949 | H.R. Welby | Pump Priming Means | reciprocating pumps |
