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Priority to JP4773889UpriorityCriticalpatent/JPH0733870Y2/ja
Priority to KR1019900002660Aprioritypatent/KR0138254B1/ko
Priority to US07/491,596prioritypatent/US5061079A/en
Publication of JPH02137925UpublicationCriticalpatent/JPH02137925U/ja
Priority to US07/736,742prioritypatent/US5141327A/en
Application grantedgrantedCritical
Publication of JPH0733870Y2publicationCriticalpatent/JPH0733870Y2/ja