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经营范围
发明名称
Wechselschreibstift
摘要
申请公布号
DE527070(C)
申请公布日期
1931.06.13
申请号
DE1929V025911D
申请日期
1929.10.30
申请人
FIRMA J.M. VIERTEL
发明人
分类号
B43K24/14
主分类号
B43K24/14
代理机构
代理人
主权项
地址
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