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Priority to JP12868990UpriorityCriticalpatent/JPH0483481U/ja
Priority to US07/789,499prioritypatent/US5188276A/en
Priority to GB9125185Aprioritypatent/GB2250721B/en
Priority to CA002056604Aprioritypatent/CA2056604C/fr
Publication of JPH0483481UpublicationCriticalpatent/JPH0483481U/ja