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发明名称
Vorrichtung zum Tragen von schreibenden Registrierinstrumenten, z.B. bei Arbeitszeitstudien
摘要
申请公布号
DE501770(C)
申请公布日期
1930.07.04
申请号
DENDATP057766D
申请日期
申请人
DR. WALTHER POPPELREUTER
发明人
分类号
G07C1/02
主分类号
G07C1/02
代理机构
代理人
主权项
地址
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