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| All Patents in class 417/552 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 6,500 | Jun. 05, 1849 | B. Holly | Pump | |
 | RE168 | May 07, 1850 | B. Holly | Improvement in Pumps | |
 | 45,040 | Nov. 15, 1864 | B. Holly | Pump Lift | |
 | 137,765 | Apr. 15, 1873 | R. Dudgeon | Improvement in hydraulic jacks | |
 | 162,044 | Apr. 13, 1875 | E.M. Dudgeon | Improvement in hydraulic jacks | |
 | 302,070 | Jul. 15, 1884 | T.H. Watson | Hydraulic jack | |
| 1,472,062 | Oct. 30, 1923 | A.F. Froussard | Pump | ||