Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filedfiledCritical
Priority to JP13767687UpriorityCriticalpatent/JPH069430Y2/ja
Priority to US07/215,854prioritypatent/US4908594A/en
Priority to KR1019880008647Aprioritypatent/KR920000226B1/ko
Publication of JPS6441946UpublicationCriticalpatent/JPS6441946U/ja
Application grantedgrantedCritical
Publication of JPH069430Y2publicationCriticalpatent/JPH069430Y2/ja