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All Patents in class 137/543.23
Patents 1 - 6 of 6
First set of recordsLast set of records
NumberDatePatenteeTitleType
123,546Feb. 13, 1872H.G. AshtonImprovement in Lock Safety-Valves for Steam-Boilerssteam safety valves
910,711Jan. 26, 1909H.C. McCarthySafety Valvesteam safety valves
921,360May 11, 1909F. CaseySafety-Valvesteam safety valves
944,330Dec. 28, 1909M.A. HudsonSteam safety-valvesteam safety valves
1,032,482Jul. 16, 1912W.E. JerauldSafety Valvesteam safety valves
2,001,375May 14, 1935H.S. BakerSafety Valvesteam safety valves
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