Number | Name | Date | Kind |
---|---|---|---|
3826364 | Bonner et al. | Jul 1974 | |
4284412 | Hansen et al. | Aug 1981 | |
4559307 | Saunders et al. | Jul 1986 | |
4607007 | Lanier et al. | Aug 1986 |
Number | Date | Country |
---|---|---|
364367 | Oct 1988 | EPX |
Entry |
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Herzenberg, et al., Sci. Amer., 231:108 (1976). |
McCoy, et al., A.J.C.P., 527 (Apr. 1990). |