Improvements in apparatus for recording sound upon films,申请号GB19330010354-传众专利搜索

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发明名称	Improvements in apparatus for recording sound upon films
摘要
申请公布号	GB417603(A)	申请公布日期	1934.10.08
申请号	GB19330010354	申请日期	1933.04.06
申请人	CHARLES WRIGHT;JAMES CANNELL	发明人
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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