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发明名称
Schaltungsanordnung fuer Fernmeldeanlagen, in denen Signale durch Wechselstroeme einer bestimmten Frequenz gegeben werden
摘要
申请公布号
DE761755(C)
申请公布日期
1953.11.02
申请号
DE1938L095305
申请日期
1938.07.30
申请人
C. LORENZ AKTIENGESELLSCHAFT
发明人
HELMERT ROBERT
分类号
H04L12/00;H04Q1/45
主分类号
H04L12/00
代理机构
代理人
主权项
地址
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