KUREHA KAGAKU KOGYO KABUSHIKI KAISHA
Patent: EP1209153 A2, 2002 ;
Location in patent: Example 2 ;

E. I. Du Pont de Nemours and Company
Patent: US4394506 A1, 1983 ;

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E. I. Du Pont de Nemours and Company
Patent: US4818278 A1, 1989 ;