Number | Name | Date | Kind |
---|---|---|---|
1871536 | LeBus | Aug 1932 | |
2515425 | Restemeier | Jul 1950 | |
2556277 | Hill et al. | Jun 1951 | |
2626124 | McCarthy | Jan 1953 | |
2748788 | Duckstein | Jun 1956 | |
3026902 | Ruhl, Jr. | Mar 1962 | |
3313458 | Braun | Apr 1967 | |
3482603 | Outcalt | Dec 1969 | |
3604453 | Boltnott | Sep 1971 | |
3789874 | Hills | Feb 1974 | |
3817273 | Erwin, Jr. | Jun 1974 | |
3857408 | Rhodes et al. | Dec 1974 | |
3974848 | Wheatley | Aug 1976 | |
3996962 | Sutherland | Dec 1976 | |
4019532 | Schittek | Apr 1977 | |
4067356 | Kreuz | Jan 1978 | |
4569636 | Bauer et al. | Feb 1986 | |
4596248 | Lieberman | Jun 1986 | |
4989635 | Dunmire | Feb 1991 |
Entry |
---|
"Check Valves", Ames (brochures), date unknown. |
"Dual Function Swing Check Valves", Merit Manufacturing Corporation (brochure), date unknown. |