Number | Date | Country | Kind |
---|---|---|---|
3-359406 | Dec 1991 | JPX | |
4-030044 | Jan 1992 | JPX | |
4-034205 | Jan 1992 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4262198 | Gupta et al. | Apr 1981 | |
4695719 | Wilwerding | Sep 1987 | |
4772784 | Yoshitoshi et al. | Sep 1988 |
Number | Date | Country |
---|---|---|
0278406 | Aug 1988 | EPX |
0439876 | Jul 1991 | EPX |
Entry |
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Patent Abstracts of Japan Publication No. JP-41-77643. |
Patent Abstract of Japan JP 56107247. |