Number | Name | Date | Kind |
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4378588 | Katzman et al. | Mar 1983 | |
4403288 | Christian et al. | Sep 1983 | |
4799140 | Dietz et al. | Jan 1989 |
Entry |
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Patent Abstracts of Japan, Publication No. JP63067004, Published Mar. 25, 1988, Abstract vol. 12, No. 291, Publshed Aug. 9, 1988. |
Patent Abstracts of Japan, Publication No. JP1177830, Published Jul. 14, 1989, Abstract vol. 13, No. 459, Published Oct. 17, 1989. |