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发明名称
Gefaltetes Kontrollabzeichen mit Anstecknadel
摘要
申请公布号
DE509799(C)
申请公布日期
1930.10.13
申请号
DE1928N028676D
申请日期
1928.04.08
申请人
FRITZ NOTTBOHM
发明人
分类号
G09F3/12
主分类号
G09F3/12
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代理人
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