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发明名称
FRESNEL LENS FOR PROJECTION SCREENS
摘要
申请公布号
EP0223310(A3)
申请公布日期
1987.10.28
申请号
EP19860202025
申请日期
1986.11.17
申请人
N.V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
GOLDENBERG, JILL FORER;MCKECHNIE, THOMAS STEWART
分类号
H04N9/31;G02B3/08;G03B21/62;H04N5/74;(IPC1-7):G03B21/62
主分类号
H04N9/31
代理机构
代理人
主权项
地址
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