Number | Name | Date | Kind |
---|---|---|---|
D296374 | Hermann et al. | Jun 1988 | |
D298375 | Hermann | Nov 1988 | |
D318357 | Adrian et al. | Jul 1991 | |
D344384 | Yamamoto et al. | Feb 1994 | |
3970187 | Esaki et al. | Jul 1976 | |
3989133 | Courson et al. | Nov 1976 | |
5156252 | Mello et al. | Oct 1992 |