Number | Date | Country | Kind |
---|---|---|---|
2-233607 | Sep 1990 | JPX | |
2-233608 | Sep 1990 | JPX | |
2-233609 | Sep 1990 | JPX | |
2-233610 | Sep 1990 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3914538 | Perreault et al. | Oct 1975 | |
4809080 | Kotani et al. | Feb 1989 | |
4833547 | Mase | May 1989 | |
4895288 | Kotani et al. | Jan 1990 | |
5040206 | Tokumasu et al. | Aug 1991 | |
5072307 | Shirakoshi et al. | Dec 1991 |
Number | Date | Country |
---|---|---|
57-160259 | Oct 1982 | JPX |
0369299 | May 1990 | JPX |
Entry |
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Patent Abstracts of Japan vol. 7, No. 99 (E-172)(1244) Apr. 27, 1983 & JP-A-58 020 059 (Ricoh). |
Patent Abstracts of Japan-(corresponding to reference 1) 57-160259. Oct. 1982. |