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| All Patents in class 251/147 | |||||
| Number | Date | Patentee | Title | Type | |
| 9,380X | Feb. 10, 1836 | C.W. Peckham | Molasses faucet | ||
| 1,189,764 | Jul. 04, 1916 | H.L. Whitman | Relief-valve for internal-combustion engines | internal combustion engines | |