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发明名称
Nuller-Einrichtung an einer Addier-, Rechen- oder rechnenden Schreibmaschine.
摘要
申请公布号
CH208376(A)
申请公布日期
1940.01.31
申请号
CHD208376
申请日期
1939.01.05
申请人
LANGENEGGER,HEINRICH
发明人
LANGENEGGER,HEINRICH
分类号
G06C7/10
主分类号
G06C7/10
代理机构
代理人
主权项
地址
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