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发明名称
VERFAHREN UND SCHALTUNGSANORDNUNG ZUR ERZEUGUNG EINES AKUSTISCHEN RUFSIGNALS IN TEILNEHMERENDSTELLEN VON FERNMELDEANLAGEN
摘要
申请公布号
DE3504243(A1)
申请公布日期
1986.08.14
申请号
DE19853504243
申请日期
1985.02.08
申请人
PHILIPS PATENTVERWALTUNG GMBH
发明人
HIRTH,PETER,DIPL.-ING.;FRERICHS,WERNER,DIPL.-ING.;GRUCZA,HUBERT
分类号
H04M1/00;H04M19/04;(IPC1-7):H04M19/04
主分类号
H04M1/00
代理机构
代理人
主权项
地址
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