Controlling device for sound record film,申请号US19400323671-传众专利搜索

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发明名称	Controlling device for sound record film
摘要
申请公布号	US2328597(A)	申请公布日期	1943.09.07
申请号	US19400323671	申请日期	1940.03.13
申请人	RECORDGRAPH CORPORATION	发明人	WOOLF WILLIAM L.
分类号	G11B15/28	主分类号	G11B15/28
代理机构		代理人
主权项
地址

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