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经营范围
发明名称
Schaltungsanordnung zur Anrufkennzeichnung besonderer an ein SA-Amt angeschlossener Sprechstellen
摘要
申请公布号
DE558554(C)
申请公布日期
1932.09.08
申请号
DE1926T032664D
申请日期
1926.11.20
申请人
TELEPHON-APPARAT-FABRIK E. ZWIETUSCH & CO. G.M.B.H.
发明人
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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