System and apparatus for determining the listening habits of wave signal receiver users,申请号US19470762962-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	US2660508(A)	申请公布日期	1953.11.24
申请号	US19470762962	申请日期	1947.07.23
申请人	A. C. NIELSEN COMPANY	发明人	RAHMEL HENRY A.
分类号	H04H60/44	主分类号	H04H60/44
代理机构		代理人
主权项
地址

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