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| US4236412 | 27 Feb 1979 | 2 Dec 1980 | | Pressure transmitting apparatus |
| US4402225 | 12 Jun 1981 | 6 Sep 1983 | | Pressure transmitting apparatus |
| US4546785 | 7 Oct 1982 | 15 Oct 1985 | Cybar Corporation | Pressure translator and system for measuring pressure |
| US4790821 | 24 Aug 1987 | 13 Dec 1988 | Vance Products Incorporated | Pressure gauge and system |
