Popularity meters for automatic phonographs,申请号US19510218641-传众专利搜索

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发明名称	Popularity meters for automatic phonographs
摘要
申请公布号	US2797048(A)	申请公布日期	1957.06.25
申请号	US19510218641	申请日期	1951.03.31
申请人	FORT PITT INDUSTRIES, INCORPORATED	发明人	JOHNSON CARL G.
分类号	G11B17/22	主分类号	G11B17/22
代理机构		代理人
主权项
地址

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