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| All Patents in class 417/446 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,687X | Aug. 05, 1831 | J. Reed | Water pump | pumps | |
| 1,678,905 | Jul. 31, 1928 | M.J. Goldberg | Pressure Relief Means | compressor relief valves | |
| 1,850,690 | Mar. 22, 1932 | S.B. Redfield | Retaining device for plate valves | air compressors | |