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Priority to JP4778689UpriorityCriticalpatent/JPH02138257U/ja
Priority to EP89117409Aprioritypatent/EP0362619B1/en
Priority to US07/409,783prioritypatent/US4934988A/en
Priority to DE8989117409Tprioritypatent/DE68904389T2/de
Priority to CA000612409Aprioritypatent/CA1324008C/en
Publication of JPH02138257UpublicationCriticalpatent/JPH02138257U/ja