EDUCATION SYSTEM UTILIZING TWO-WAY CATV,申请号JP19900057223-传众专利搜索

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发明名称	EDUCATION SYSTEM UTILIZING TWO-WAY CATV
摘要
申请公布号	JPH03108890(A)	申请公布日期	1991.05.09
申请号	JP19900057223	申请日期	1990.03.08
申请人	YAGI ANTENNA CO LTD	发明人	KITATANI CHIHIRO;SHINGURYO OSAMU;TANAKA CHIHARU
分类号	H04N7/173;H04M11/00	主分类号	H04N7/173
代理机构		代理人
主权项
地址

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