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发明名称
Schaltungsanordnung für Telephonanlagen zum Herstellen von Verbindungen von Unterämtern nach Hauptämtern, sowie Ortsverbindungen in Unterämtern.
摘要
申请公布号
CH139025(A)
申请公布日期
1930.03.31
申请号
CHD139025
申请日期
1928.06.21
申请人
BELL TELEPHONE MANUFACTURING CO.
发明人
CO. BELL TELEPHONE MANUFACTURING
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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