Number | Name | Date | Kind |
---|---|---|---|
4161726 | Burson et al. | Jul 1979 | |
4305007 | Hughes | Dec 1981 | |
4434412 | Ruumpol | Feb 1984 | |
4489303 | Martin | Dec 1984 | |
4654576 | Oelsch et al. | Mar 1987 | |
4685678 | Frederiksen | Aug 1987 | |
4712376 | Hadank et al. | Dec 1987 | |
4789556 | Duimel | Nov 1989 | |
4795952 | Brandstetter | Jan 1989 | |
4825157 | Mikan | Apr 1989 | |
5002454 | Hadank et al. | Mar 1991 | |
5112184 | Tapper et al. | May 1992 |
Number | Date | Country |
---|---|---|
0361666 | Apr 1990 | EPX |
63-214601 | Jul 1988 | JPX |
325802 | Feb 1930 | GBX |
2060173 | Apr 1981 | GBX |
2072856 | Oct 1981 | GBX |
WO06242 | Aug 1988 | WOX |
WO09927 | Oct 1989 | WOX |
Entry |
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Hydraulics & Pneumatics, Jun. 1988, "What's Behind That Joystock?", by: D. D. Schumann, P.E. |