Production of sound motion pictures,申请号US19370179071-传众专利搜索

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发明名称	Production of sound motion pictures
摘要
申请公布号	US2178217(A)	申请公布日期	1939.10.31
申请号	US19370179071	申请日期	1937.12.10
申请人	RADIO CORPORATION OF AMERICA	发明人	BAKER JUDD O.
分类号	G03C5/14;G03C7/24	主分类号	G03C5/14
代理机构		代理人
主权项
地址

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