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经营范围
发明名称
OPTICAL SYMBOL DISPLAY APPARATUS
摘要
申请公布号
US3490838(A)
申请公布日期
1970.01.20
申请号
USD3490838
申请日期
1967.03.21
申请人
OLYMPIA WERKE AG.
发明人
HANS HEYMANN
分类号
G03B21/134;G08B5/36;G09F9/40;(IPC1-7):G03B23/06
主分类号
G03B21/134
代理机构
代理人
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