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Priority to JP1989011596UpriorityCriticalpatent/JPH0328331U/ja
Priority to CA000609351Aprioritypatent/CA1315328C/en
Priority to US07/400,101prioritypatent/US5064029A/en
Priority to KR1019890012364Aprioritypatent/KR940001732B1/ko
Priority to DE68914940Tprioritypatent/DE68914940T2/de
Priority to EP89308789Aprioritypatent/EP0367387B1/en
Publication of JPH0328331UpublicationCriticalpatent/JPH0328331U/ja