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All Patents in class 251/338
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
20,919Jul. 13, 1858B. HollyDamper
85,792Jan. 12, 1869G.H. ClemensImprovement in steam safety-valvessteam safety valves
113,517Apr. 11, 1871B. HollySafety Valvesteam safety valves
331,246Nov. 24, 1885J.W. KenyonSteam-trap
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