Number | Date | Country | Kind |
---|---|---|---|
P931047A | Jul 1993 | HRX |
Number | Name | Date | Kind |
---|---|---|---|
4159984 | Yoshioka | Jul 1979 | |
4427586 | Numata | Jan 1984 | |
5075439 | Busch et al. | Dec 1991 |
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