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Priority to JP12036390UpriorityCriticalpatent/JPH0477999U/ja
Priority to US07/750,245prioritypatent/US5376772A/en
Priority to CA002050233Aprioritypatent/CA2050233C/en
Priority to DE69111717Tprioritypatent/DE69111717T2/de
Priority to EP91307947Aprioritypatent/EP0473447B1/en
Publication of JPH0477999UpublicationCriticalpatent/JPH0477999U/ja