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All Patents in class 251/322
Patents 1 - 3 of 3
First set of recordsLast set of records
17,433Jun. 02, 1857L.J. KnowlesFaucet
188,154Mar. 06, 1877B.J. Thurston, W.D. LeavittImprovement in gas and water regulators
583,399May 25, 1897G.W. LewisGas or Oil Vapor Engineinternal combustion engines
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