Photographic sound recording apparatus,申请号US19300466728-传众专利搜索

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发明名称	Photographic sound recording apparatus
摘要
申请公布号	US2028006(A)	申请公布日期	1936.01.14
申请号	US19300466728	申请日期	1930.07.09
申请人	OWENS FREEMAN H	发明人	OWENS FREEMAN H.
分类号	G11B7/28	主分类号	G11B7/28
代理机构		代理人
主权项
地址

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