Number | Name | Date | Kind |
---|---|---|---|
5052048 | Heinrich | Sep 1991 | |
5479482 | Grimes | Dec 1995 | |
5548583 | Bustamante | Aug 1996 | |
5598460 | Tendler | Jan 1997 | |
5689548 | Maupin et al. | Nov 1997 | |
5712900 | Maupin et al. | Jan 1998 |
Entry |
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PCT International Search Report, Sep. 23, 1998, PCT/US 98/00753. |