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3707891 | Asano et al. | Jan 1973 | |
4539869 | Suga et al. | Sep 1985 | |
5088357 | Kamada et al. | Jan 1991 | |
5368531 | Ando et al. | Nov 1994 | |
5393279 | Bota et al. | Feb 1995 | |
5417627 | Iizuka | May 1995 |
Number | Date | Country |
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0354004 | Feb 1990 | EPX |
4138080 | May 1992 | DEX |
Entry |
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Patent Abstracts of Japan vol. 8, No. 120 (M-300) 6 Jun. 1984 & JP-A-59 026 660. |