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发明名称
CIRCUIT FOR PREVENTING UNWANTED LONG-DISTANCE CALL
摘要
申请公布号
KR1019950007979(B1)
申请公布日期
1995.07.21
申请号
KR1019920014415
申请日期
1992.08.12
申请人
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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