Number | Date | Country | Kind |
---|---|---|---|
2-416974 | Dec 1990 | JPX | |
2-416975 | Dec 1990 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4273697 | Sumimura et al. | Jun 1981 | |
4728687 | Watanabe et al. | Mar 1988 | |
4980384 | Takahashi et al. | Dec 1990 | |
5053167 | Kawaguchi | Oct 1991 | |
5082596 | Fukuda et al. | Jan 1992 |
Number | Date | Country |
---|---|---|
2-124977 | May 1990 | JPX |
Entry |
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Patent Abstracts of Japan, vol. 13, No. 205 (C-595) Jan. 25, 1989. |
Patent Abstracts of Japan, vol. 14, No. 342 (C-743) May 14, 1990. |