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Priority to JP8651389UpriorityCriticalpatent/JPH0326090U/ja
Priority to US07/548,521prioritypatent/US5166574A/en
Priority to CA002020587Aprioritypatent/CA2020587C/en
Priority to EP90113165Aprioritypatent/EP0407975B1/en
Priority to DE69031520Tprioritypatent/DE69031520T2/de
Publication of JPH0326090UpublicationCriticalpatent/JPH0326090U/ja