| All Patents in class 137/454.4 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 1,219,511 | Mar. 20, 1917 | C.W. Weiss | Air Compressor | air compressors |
| 1,708,158 | Apr. 09, 1929 | E.H. Stedman | Valve structure for compressors | air compressors |
| 1,850,690 | Mar. 22, 1932 | S.B. Redfield | Retaining device for plate valves | air compressors |
| 1,890,051 | Dec. 06, 1932 | H.A. Gehres | Valve Mechanism | internal combustion engine valves |
| 1,986,810 | Jan. 08, 1935 | H.V. Haight | Valve assembly | air compressors |
| 2,306,170 | Dec. 22, 1942 | J. Kuttner | Pressure-Responsive Valve | compressor relief valves |
