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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.)
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Publication date
Application filedfiledCritical
Priority to JP5636784UpriorityCriticalpatent/JPS60170890U/ja
Priority to US06/721,939prioritypatent/US4612850A/en
Priority to GB08509576Aprioritypatent/GB2162051B/en
Priority to KR2019850004255Uprioritypatent/KR900008338Y1/ko
Publication of JPS60170890UpublicationCriticalpatent/JPS60170890U/ja
Priority to GB08601505Aprioritypatent/GB2167653B/en
Priority to KR2019870009822Uprioritypatent/KR900008340Y1/ko
Application grantedgrantedCritical
Publication of JPS6331179Y2publicationCriticalpatent/JPS6331179Y2/ja