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Priority to JP9620388UpriorityCriticalpatent/JPH0218107U/ja
Priority to CA 588435prioritypatent/CA1297985C/en
Priority to EP89113274Aprioritypatent/EP0351833B1/en
Priority to DE1989626638prioritypatent/DE68926638T2/de
Publication of JPH0218107UpublicationCriticalpatent/JPH0218107U/ja
Priority to US07/598,770prioritypatent/US5070468A/en