Apparatus for reproducing photographic sound records,申请号US19290371810-传众专利搜索

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发明名称	Apparatus for reproducing photographic sound records
摘要
申请公布号	US1846569(A)	申请公布日期	1932.02.23
申请号	US19290371810	申请日期	1929.06.18
申请人	OWENS DEVELOPMENT CORPORATION	发明人	OWENS FREEMAN H.
分类号	G03B31/02	主分类号	G03B31/02
代理机构		代理人
主权项
地址

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