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Priority to JP1990072872UpriorityCriticalpatent/JPH0756491Y2/ja
Priority to CA002046435Aprioritypatent/CA2046435C/en
Priority to US07/727,468prioritypatent/US5146799A/en
Publication of JPH0431803UpublicationCriticalpatent/JPH0431803U/ja
Application grantedgrantedCritical
Publication of JPH0756491Y2publicationCriticalpatent/JPH0756491Y2/ja
