Number | Date | Country | Kind |
---|---|---|---|
42 21 535.8 | Jul 1992 | DEX | |
42 28 555.0 | Aug 1992 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4355044 | Heller | Oct 1982 | |
4766130 | Austel et al. | Aug 1988 | |
4816463 | Blankley et al. | Mar 1989 | |
4880804 | Carini et al. | Nov 1989 | |
5332744 | Chakravarty et al. | Jul 1994 | |
5334598 | Bagley et al. | Aug 1994 |
Entry |
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Takehiko et al., CA 116:6558 (EP Pat. 434038, 26 Jun. 1991). |