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发明名称
Kopplingsanordning för sändning av likströmsimpulser på telefonledningar
摘要
申请公布号
FI13559(A)
申请公布日期
1931.05.29
申请号
FID13559
申请日期
申请人
TELEFON AB L M ERICSSON
发明人
TRECHCINSKI ROMAN
分类号
H04Q1/30;(IPC1-7):H04Q1/30
主分类号
H04Q1/30
代理机构
代理人
主权项
地址
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