Light controlling refractor and luminaire using the same,申请号US19500157978-传众专利搜索

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发明名称	Light controlling refractor and luminaire using the same
摘要
申请公布号	US2648763(A)	申请公布日期	1953.08.11
申请号	US19500157978	申请日期	1950.04.25
申请人	HOLOPHANE COMPANY, INC.	发明人	ROLPH THOMAS W.;FRANCK KURT
分类号	F21V3/00;F21V5/02	主分类号	F21V3/00
代理机构		代理人
主权项
地址

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