Perfectionnements aux systèmes électro-optiques,申请号FRD713927-传众专利搜索

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发明名称	Perfectionnements aux systèmes électro-optiques
摘要
申请公布号	FR713927(A)	申请公布日期	1931.11.04
申请号	FRD713927	申请日期	1931.03.27
申请人	ELECTRICAL RESEARCH PRODUCTS INC.	发明人
分类号	H04N5/222	主分类号	H04N5/222
代理机构		代理人
主权项
地址

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