Number | Date | Country | Kind |
---|---|---|---|
3935276 | Oct 1989 | DEX | |
4003219 | Feb 1990 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4619798 | Tanaka | Oct 1986 | |
4624812 | Farrow | Nov 1986 | |
5043121 | Wingefeld | Aug 1991 |
Entry |
---|
Advanced Ceramics Report, vol. 4, No. 8, Aug. 1989, p. 6. |
Chemical Abstracts, vol. 103, entry 186625 (1985). |