VIDEO AUDIO LECTURE SYSTEM,申请号JP19900419150-传众专利搜索

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发明名称	VIDEO AUDIO LECTURE SYSTEM
摘要
申请公布号	JPH04230138(A)	申请公布日期	1992.08.19
申请号	JP19900419150	申请日期	1990.12.27
申请人	TOSHIBA CORP	发明人	UBUSAWA NOBUMASA
分类号	H04M11/00;H04L12/18;H04L12/42;H04N7/14	主分类号	H04M11/00
代理机构		代理人
主权项
地址

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