Number | Date | Country | Kind |
---|---|---|---|
2-219716 | Aug 1990 | JPX | |
3-83570 | Mar 1991 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
5013695 | Kato et al. | May 1991 |
Number | Date | Country |
---|---|---|
0412440 | Feb 1991 | EPX |
56-102003 | Aug 1981 | JPX |
57-21010 | Feb 1982 | JPX |
0156367 | Sep 1982 | JPX |
58-20905 | Apr 1983 | JPX |
59-23048 | May 1984 | JPX |
61-41863 | Sep 1986 | JPX |
62-10096 | Jan 1987 | JPX |
63-117958 | May 1988 | JPX |
1-227303 | Sep 1989 | JPX |
1-227304 | Sep 1989 | JPX |
Entry |
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World Patents Index, Week 8049, Derwent Publications Ltd., London, GB; AN 80-85052C & JP-A-55 131 901 (KCK KK) Oct. 15, 1980-abstract. |
Chemical Abstracts, vol. 107, Columbus, Ohio, US; abstract No. 69267N, p. 689; abstract & JP-A-6 205 509 (Taiyo Yuden Co., Ltd.) Jan. 12, 1987. |