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.)
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Priority to JP1988092184UpriorityCriticalpatent/JPH0213987U/ja
Priority to KR1019890009898Aprioritypatent/KR970001913B1/ko
Publication of JPH0213987UpublicationCriticalpatent/JPH0213987U/ja
Priority to US07/544,065prioritypatent/US5033803A/en
Priority to US07/729,874prioritypatent/US5191736A/en
