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Priority to JP19663687UpriorityCriticalpatent/JPH01100688U/ja
Priority to US07/288,187prioritypatent/US4904839A/en
Priority to CA000586975Aprioritypatent/CA1308175C/en
Priority to DE3844001Aprioritypatent/DE3844001A1/de
Publication of JPH01100688UpublicationCriticalpatent/JPH01100688U/ja