Perfectionnement aux appareils de projection,申请号FRD714816-传众专利搜索

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发明名称	Perfectionnement aux appareils de projection
摘要
申请公布号	FR714816(A)	申请公布日期	1931.11.20
申请号	FRD714816	申请日期	1931.04.04
申请人		发明人	DUSSERI HENRI-FRANCOIS-ETIEN
分类号	G03B21/00	主分类号	G03B21/00
代理机构		代理人
主权项
地址

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