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发明名称
Schaubildkasten zur Durchfuehrung von Kontrollen, statistischen Erhebungen u. dgl.
摘要
申请公布号
DE555988(C)
申请公布日期
1932.08.01
申请号
DED555988D
申请日期
1930.10.26
申请人
CONRAD KRUPPOK
发明人
分类号
G09D1/00;G09F11/26;H03J1/02
主分类号
G09D1/00
代理机构
代理人
主权项
地址
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