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All Patents in class 137/558
Patents 1 - 5 of 5
First set of recordsLast set of records
85,792Jan. 12, 1869G.H. ClemensImprovement in steam safety-valvessteam safety valves
206,259Jul. 23, 1878E.S. PrimeImprovement in Wantage Rods
1,147,835Jul. 27, 1915R. WoodLow Water Alarm for Steam Boilers and the Likelow water alarms
1,464,669Aug. 14, 1923G.W. StetsonWater regulator
1,948,725Feb. 27, 1934J.D. McClintockSafey Connectionlow water alarms
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