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发明名称
Wechselschreibgeraet,insbesondere Zweifarbkugelschreiber
摘要
申请公布号
DE1411938(A1)
申请公布日期
1969.04.30
申请号
DE19621411938
申请日期
1962.01.23
申请人
BROSS,DIPL.-ING. HELMUT
发明人
HELMUT BROSS,DIPL.-ING.
分类号
B43K24/10
主分类号
B43K24/10
代理机构
代理人
主权项
地址
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