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 JP1987111451UpriorityCriticalpatent/JPH0333634Y2/ja
Priority to GB8816110Aprioritypatent/GB2208225B/en
Priority to US07/216,215prioritypatent/US4978020A/en
Priority to KR2019880011188Uprioritypatent/KR920001608Y1/ko
Publication of JPS6417933UpublicationCriticalpatent/JPS6417933U/ja
Application grantedgrantedCritical
Publication of JPH0333634Y2publicationCriticalpatent/JPH0333634Y2/ja