Number | Name | Date | Kind |
---|---|---|---|
4311712 | Evans et al. | Jan 1982 | A |
4370349 | Evans et al. | Jan 1983 | A |
4745160 | Churchill et al. | May 1988 | A |
4997454 | Violante et al. | Mar 1991 | A |
5019400 | Gombotz et al. | May 1991 | A |
5543158 | Gref et al. | Aug 1996 | A |
6322805 | Kim et al. | Nov 2001 | B1 |
Number | Date | Country |
---|---|---|
0 397 307 | Nov 1990 | EP |
0 520 888 | Dec 1992 | EP |
0 583 955 | Feb 1994 | EP |
Entry |
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PGPUBS Document US2003/0202978, filed on Oct. 30, 2003, Maa et al. |