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发明名称
Schaltungsanordnung für automatische und halbautomatische Telephonanlagen.
摘要
申请公布号
CH145798(A)
申请公布日期
1931.03.15
申请号
CHD145798
申请日期
1930.01.22
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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