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Priority to JP7416289UpriorityCriticalpatent/JPH0740438Y2/ja
Priority to US07/542,174prioritypatent/US5054814A/en
Priority to CA002019654Aprioritypatent/CA2019654C/en
Publication of JPH0311964UpublicationCriticalpatent/JPH0311964U/ja
Application grantedgrantedCritical
Publication of JPH0740438Y2publicationCriticalpatent/JPH0740438Y2/ja
