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发明名称
Schaltungsanordnung fuer Tonfrequenzwahlsysteme
摘要
申请公布号
DE838457(C)
申请公布日期
1952.05.08
申请号
DE1950T001318
申请日期
1950.06.17
申请人
TELEFONBAU UND NORMALZEIT G.M.B.H.
发明人
HEBEL DR.-ING. MARTIN
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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