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| All Patents in class 251/291 | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 33,095 | Aug. 20, 1861 | B.B. Moore | Hydrant | |
| 1,629,449 | May 17, 1927 | G.B. Duffield | Valve Operating Device | ||
| 1,807,625 | Jun. 02, 1931 | H.J. Hjorth | Valve Wrench | ||
| 2,879,026 | Mar. 24, 1959 | R.C. Geiger, D.A. Meeker | Detachable actuator | ||