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发明名称
Fuellbleistift in Verbindung mit einem Fuellfederhalter
摘要
申请公布号
DE539057(C)
申请公布日期
1931.11.23
申请号
DE1928L070677D
申请日期
1928.01.11
申请人
DR. HERMANN LANGEN;DR. ERNST RITTERSHAUS
发明人
分类号
B43K27/02
主分类号
B43K27/02
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OPTICAL DATA TRANSCEIVERS
