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All Patents in class 137/454.4
Patents 1 - 6 of 6
First set of recordsLast set of records
NumberDatePatenteeTitleType
1,219,511Mar. 20, 1917C.W. WeissAir Compressorair compressors
1,708,158Apr. 09, 1929E.H. StedmanValve structure for compressorsair compressors
1,850,690Mar. 22, 1932S.B. RedfieldRetaining device for plate valvesair compressors
1,890,051Dec. 06, 1932H.A. GehresValve Mechanisminternal combustion engine valves
1,986,810Jan. 08, 1935H.V. HaightValve assemblyair compressors
2,306,170Dec. 22, 1942J. KuttnerPressure-Responsive Valvecompressor relief valves
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