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发明名称
Overvågningssignalanlæg, navnlig til anvendelse i telegrafanlæg.
摘要
申请公布号
DK80558(C)
申请公布日期
1956.02.20
申请号
DK19470004890
申请日期
1947.12.23
申请人
STAATSBEDRIJF DER POSTERIJEN, TELEGRAFIE EN TELEFONIE
发明人
ROELOF MAARTEN MARIE OBERMAN
分类号
主分类号
代理机构
代理人
主权项
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