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经营范围
发明名称
Schulrechenmaschine
摘要
申请公布号
DE857697(C)
申请公布日期
1952.12.01
申请号
DE1951I004282
申请日期
1951.06.20
申请人
FA. HEINRICH IHRIG
发明人
IHRIG HEINRICH
分类号
G09B19/02
主分类号
G09B19/02
代理机构
代理人
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地址
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