Mounting for phonographic pick-up devices,申请号US19290345253-传众专利搜索

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发明名称	Mounting for phonographic pick-up devices
摘要
申请公布号	US1746004(A)	申请公布日期	1930.02.04
申请号	US19290345253	申请日期	1929.03.08
申请人	NORTH AMERICAN SOUND;TALKING PICTURE EQUIPMENT CORPORATION	发明人	MARSHALL ROBERT J.
分类号	G11B3/12	主分类号	G11B3/12
代理机构		代理人
主权项
地址

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