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Application filedfiledCritical
Priority to JP1986098070UpriorityCriticalpatent/JPH062023Y2/ja
Publication of JPS633517UpublicationCriticalpatent/JPS633517U/ja
Priority to US07/293,934prioritypatent/US4958943A/en
Priority to US07/344,004prioritypatent/US4909640A/en
Application grantedgrantedCritical
Publication of JPH062023Y2publicationCriticalpatent/JPH062023Y2/ja
