VISUAL AID ESPECIALLY FOR WEAK-SIGHTED PERSONS

申请公布号：EP0178014(A3)

申请号：EP19850201572

申请日期：1985.10.01

申请公布日期：1988.01.27

申请人：

N.V. OPTIMED

发明人：HELLSTROM, LARS

分类号：G02C7/02;G02C7/08;(IPC1-7):G02C7/08

主分类号：G02C7/02

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