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Application filedfiledCritical
Priority to JP1634985UpriorityCriticalpatent/JPH0417735Y2/ja
Priority to US06/827,788prioritypatent/US4707007A/en
Priority to CA000501413Aprioritypatent/CA1266070A/en
Publication of JPS61133667UpublicationCriticalpatent/JPS61133667U/ja
Application grantedgrantedCritical
Publication of JPH0417735Y2publicationCriticalpatent/JPH0417735Y2/ja
