Number | Date | Country | Kind |
---|---|---|---|
2-257430 | Sep 1990 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4643131 | Umeda | Feb 1987 | |
4655168 | Shimozato | Apr 1987 |
Number | Date | Country |
---|---|---|
59-038382 | Jun 1984 | JPX |
1-184270 | Oct 1989 | JPX |
1-225768 | Dec 1989 | JPX |
Entry |
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"Patent Abstracts of Japan", vol. 13, No. 549 (C-662) (3897) Dec. 7, 1989. |
"Patent Abstracts of Japan", vol. 13, No. 472 (C-647) (3820) Oct. 25, 1989. |
"Patent Abstracts of Japan", vol. 8, No. 126 (C-228) (1563) Jun. 13, 1984. |