Number | Name | Date | Kind |
---|---|---|---|
3806259 | Boomstrom et al. | Apr 1974 | |
4120592 | Fleming et al. | Oct 1978 | |
4640617 | Hughes et al. | Feb 1987 | |
4657390 | Doyle | Apr 1987 | |
4799001 | Burch | Jan 1989 | |
4810092 | Avth | Mar 1989 | |
4847878 | Badeau | Jul 1989 |
Number | Date | Country |
---|---|---|
63-148146 | Jun 1988 | JPX |
Entry |
---|
Wilks Scientific Corporation Data Sheet, Nov. 5, 1968. |