TELEPHONE CONFERENCE CIRCUIT,申请号CAD633556-传众专利搜索

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发明名称	TELEPHONE CONFERENCE CIRCUIT
摘要
申请公布号	CA633556(A)	申请公布日期	1961.12.26
申请号	CAD633556	申请日期
申请人	WESTERN ELECTRIC COMPANY, INCORPORATED	发明人	HENRY H. ABBOTT
分类号		主分类号
代理机构		代理人
主权项
地址

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