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Priority to JP1988086810UpriorityCriticalpatent/JPH0211572U/ja
Priority to CA000592576Aprioritypatent/CA1328015C/en
Priority to US07/320,286prioritypatent/US5048008A/en
Priority to KR1019890002945Aprioritypatent/KR0127312B1/ko
Priority to DE68915820Tprioritypatent/DE68915820T2/de
Priority to EP89104311Aprioritypatent/EP0332214B1/en
Priority to AT89104311Tprioritypatent/ATE107073T1/de
Publication of JPH0211572UpublicationCriticalpatent/JPH0211572U/ja