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发明名称
Vorrichtung zum Zaehlen der von einem Fernsprecher mit Waehlscheibe aus gefuehrten gebuehrenpflichtigen Gespraeche
摘要
申请公布号
DE558135(C)
申请公布日期
1932.09.01
申请号
DED558135D
申请日期
1930.12.02
申请人
WALTER DORNHEIM
发明人
分类号
H04M15/30
主分类号
H04M15/30
代理机构
代理人
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