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发明名称
SELBSTTAETIGES LESEZEICHEN.
摘要
申请公布号
DE1608863(U)
申请公布日期
1950.06.29
申请号
DE194900D2112U
申请日期
1949.07.14
申请人
OTTO WORIEN
发明人
OTTO WORIEN
分类号
主分类号
代理机构
代理人
主权项
地址
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