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Application filedfiledCritical
Priority to JP10270281UpriorityCriticalpatent/JPS588114U/ja
Priority to US06/474,642prioritypatent/US4584954A/en
Publication of JPS588114UpublicationCriticalpatent/JPS588114U/ja
Application grantedgrantedCritical
Publication of JPS6114382Y2publicationCriticalpatent/JPS6114382Y2/ja
Priority to US07/223,736prioritypatent/US4987842A/en
Priority to US07/396,182prioritypatent/US4920905A/en