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Priority to JP9042089UpriorityCriticalpatent/JPH0330391U/ja
Priority to US07/548,532prioritypatent/US5145433A/en
Priority to CA002020588Aprioritypatent/CA2020588C/en
Priority to DE69033410Tprioritypatent/DE69033410T2/de
Priority to EP90113181Aprioritypatent/EP0407986B1/en
Publication of JPH0330391UpublicationCriticalpatent/JPH0330391U/ja