Number | Name | Date | Kind |
---|---|---|---|
2144862 | Truxell | Jan 1939 | |
2552445 | Nielsen | May 1951 | |
2621011 | Smith | Dec 1952 | |
2916048 | Gunkel | Dec 1959 | |
3532121 | Sturman et al. | Oct 1970 | |
3570806 | Sturman et al. | Mar 1971 | |
3570807 | Sturman et al. | Mar 1971 | |
3570833 | Sturman et al. | Mar 1971 | |
3585547 | Sturman et al. | Jun 1971 | |
3604959 | Sturman | Sep 1971 | |
3683239 | Sturman | Aug 1972 | |
3743898 | Sturman | Jul 1973 | |
3753547 | Topham | Aug 1973 | |
3814376 | Reinicke | Aug 1972 | |
3821967 | Sturman et al. | Jul 1974 | |
3835829 | Links | Sep 1974 | |
3989066 | Sturman et al. | Nov 1976 | |
4107546 | Sturman et al. | Aug 1978 | |
4108419 | Sturman et al. | Aug 1978 | |
4114647 | Sturman et al. | Sep 1978 | |
4114648 | Nakajima et al. | Sep 1978 | |
4248270 | Ostrowski | Feb 1981 | |
4275693 | Leckie | Jun 1981 | |
4392612 | Deckard et al. | Jul 1983 | |
4409638 | Sturman et al. | Oct 1983 | |
4482094 | Knape | Nov 1984 | |
4501290 | Sturman et al. | Feb 1985 | |
4516600 | Sturman et al. | May 1985 | |
4518147 | Andresen et al. | May 1985 | |
4526519 | Mowbray et al. | Jul 1985 | |
4541454 | Sturman et al. | Sep 1985 | |
4558844 | Donahue et al. | Dec 1985 | |
4653455 | Eblen et al. | Mar 1987 | |
4690371 | Bosley et al. | Sep 1987 | |
4702212 | Best et al. | Oct 1987 | |
4749167 | Gottschall | Jun 1988 | |
4794890 | Richeson, Jr. | Jan 1989 | |
4811221 | Sturman et al. | Mar 1989 | |
4813599 | Greiner et al. | Mar 1989 | |
4829947 | Lequesne | May 1989 | |
4831989 | Haines | May 1989 | |
4846440 | Carlson et al. | Jul 1989 | |
4883025 | Richeson, Jr. | Nov 1989 | |
4964571 | Taue et al. | Oct 1990 | |
4993637 | Kanesaka | Feb 1991 | |
5050543 | Kawamura | Sep 1991 | |
5121730 | Ausman et al. | Jun 1992 | |
5131624 | Kreuter et al. | Jul 1992 | |
5199392 | Kreuter et al. | Apr 1993 | |
5350153 | Moringo et al. | Sep 1994 |
Number | Date | Country |
---|---|---|
0246373 | Mar 1992 | EPX |
Entry |
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Sturman, "Breakthrough in Digital Valves", Machine Design, vol. 66, No. 4, Feb. 21, 1994, pp. 37-42. |