Dual shutter control system for photographic sound apparatus,申请号US19290393032-传众专利搜索

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发明名称	Dual shutter control system for photographic sound apparatus
摘要
申请公布号	US1942067(A)	申请公布日期	1934.01.02
申请号	US19290393032	申请日期	1929.09.16
申请人	OWENS FREEMAN H	发明人	OWENS FREEMAN H.
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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