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Priority to JP11294990UpriorityCriticalpatent/JPH0469966U/ja
Priority to US07/699,656prioritypatent/US5142137A/en
Priority to DE69121303Tprioritypatent/DE69121303T2/de
Priority to EP91304507Aprioritypatent/EP0457623B1/en
Publication of JPH0469966UpublicationCriticalpatent/JPH0469966U/ja
