Improvements in or relating to motion picture films,申请号GB19290026052-传众专利搜索

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发明名称	Improvements in or relating to motion picture films
摘要
申请公布号	GB319659(A)	申请公布日期	1930.11.27
申请号	GB19290026052	申请日期	1929.08.27
申请人	ELECTRICAL RESEARCH PRODUCTS INC.	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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