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Priority to JP1990075253UpriorityCriticalpatent/JP2543307Y2/ja
Priority to US07/592,556prioritypatent/US5085117A/en
Publication of JPH0392694UpublicationCriticalpatent/JPH0392694U/ja
Priority to US07/798,512prioritypatent/US5276274A/en
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Publication of JP2543307Y2publicationCriticalpatent/JP2543307Y2/ja