Number | Date | Country | Kind |
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3-231893 | Sep 1991 | JPX | |
4-209203 | Aug 1992 | JPX |
Number | Name | Date | Kind |
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4806474 | Hershberger | Feb 1989 | |
4970150 | Yaku et al. | Nov 1990 | |
4992180 | Onodera | Feb 1991 | |
5130243 | Kimura et al. | Jul 1992 |
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JO2-215393 (Aug. 28, 1990) Shimomura et al. "Production of Chitosan Hydrolysate". |