Photographic sound recording system and aperture plate therefor,申请号US19470742545-传众专利搜索

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发明名称	Photographic sound recording system and aperture plate therefor
摘要
申请公布号	US2468049(A)	申请公布日期	1949.04.26
申请号	US19470742545	申请日期	1947.04.19
申请人	RADIO CORPORATION OF AMERICA	发明人	DIMMICK GLENN L.
分类号	G11B7/00	主分类号	G11B7/00
代理机构		代理人
主权项
地址

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