An improved method of and means for reproducing sound in combination with the projection of motion pictures,申请号GB19290013525-传众专利搜索

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发明名称	An improved method of and means for reproducing sound in combination with the projection of motion pictures
摘要
申请公布号	GB337429(A)	申请公布日期	1930.11.03
申请号	GB19290013525	申请日期	1929.05.01
申请人	WILLIAM CHARLES BAILEY;JOHN KEEFE	发明人
分类号	G03B31/00	主分类号	G03B31/00
代理机构		代理人
主权项
地址

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