System and apparatus for determining the listening habits of wave signal receiver users,申请号US19480017314-传众专利搜索

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发明名称	System and apparatus for determining the listening habits of wave signal receiver users
摘要
申请公布号	US2660507(A)	申请公布日期	1953.11.24
申请号	US19480017314	申请日期	1948.03.26
申请人	A. C. NIELSEN COMPANY	发明人	CORDELL GEORGE RALPH
分类号	H04H60/43	主分类号	H04H60/43
代理机构		代理人
主权项
地址

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