Number | Name | Date | Kind |
---|---|---|---|
4298710 | Ohya et al. | Nov 1981 | |
4981892 | Nishida et al. | Jan 1991 |
Number | Date | Country |
---|---|---|
60-23447 | Feb 1985 | JPX |
1-075290 | Mar 1989 | JPX |
Entry |
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Plasdoc-Central Patents Index-Basic Abstracts Journal, accession No. 89-127712, London, GB; & JP-A-1 075 290 (Mitsubishi Rayon K.K.) Sep. 18, 1987. |