Audience reaction recorder,申请号US19470783347-传众专利搜索

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法人/股东/高管

发明名称	Audience reaction recorder
摘要
申请公布号	US2547074(A)	申请公布日期	1951.04.03
申请号	US19470783347	申请日期	1947.10.31
申请人	CIRLIN BERNARD D	发明人	CIRLIN BERNARD D.
分类号	H04H60/33	主分类号	H04H60/33
代理机构		代理人
主权项
地址

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