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发明名称
FRESNELLINSE MIT STUFEN AUF BEIDEN SEITEN FUER OVERHEADPROJEKTION
摘要
申请公布号
DE69509074(D1)
申请公布日期
1999.05.20
申请号
DE19956009074
申请日期
1995.02.16
申请人
MINNESOTA MINING AND MFG. CO., ST. PAUL, MINN., US
发明人
ECKHARDT, STEPHEN, K., SAINT PAUL, MN 55133-3427, US
分类号
G02B3/08;G03B21/132;(IPC1-7):G02B3/08;G02B19/00
主分类号
G02B3/08
代理机构
代理人
主权项
地址
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