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发明名称
Leuchtbuchstabe
摘要
申请公布号
DE523426(C)
申请公布日期
1931.04.23
申请号
DENDATG075515D
申请日期
申请人
FRIEDRICH GRUENHUT
发明人
分类号
G09F13/04
主分类号
G09F13/04
代理机构
代理人
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