Surface réfléchissante et notamment écran de projection,申请号FRD1052988-传众专利搜索

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发明名称	Surface réfléchissante et notamment écran de projection
摘要
申请公布号	FR1052988(A)	申请公布日期	1954.01.29
申请号	FRD1052988	申请日期	1952.03.24
申请人	ORAY	发明人
分类号	G03B21/60	主分类号	G03B21/60
代理机构		代理人
主权项
地址

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