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发明名称
Anordnung zum Verhindern von Anschlüssen an eine gewisse Leitungsgruppe in selbsttätigen Fernsprechanlagen mit Registern.
摘要
申请公布号
CH139961(A)
申请公布日期
1930.05.15
申请号
CHD139961
申请日期
1929.04.17
申请人
TELEFONAKTIEBOLAGET L. M. ERICSSON
发明人
ERICSSON TELEFONAKTIEBOLAGET L. M.
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