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发明名称
Installation téléphonique à plusieurs postes centraux et à lignes de jonction à deux conducteurs bloquées
摘要
申请公布号
FR863942(A)
申请公布日期
1941.04.12
申请号
FRD863942
申请日期
1939.05.06
申请人
TELEFONBAU UND NORMALZEIT 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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