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| All Patents in class 222/249 | |||||
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| Number | Date | Patentee | Title | Type | |
| 335,855 | Feb. 09, 1886 | J.T. Toole | Steam Actuated Valve | steam engine valves | |
| 2,536,791 | Jan. 02, 1951 | H.R. Welby | Liquid Feed Dividing Means | liquid manifolds | |