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Priority to JP11778790UpriorityCriticalpatent/JPH0474181U/ja
Priority to US07/708,499prioritypatent/US5207287A/en
Priority to DE69112284Tprioritypatent/DE69112284T2/de
Priority to EP91109280Aprioritypatent/EP0460664B1/en
Publication of JPH0474181UpublicationCriticalpatent/JPH0474181U/ja
