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发明名称
METHOD AND ARRANGEMENT FOR CHECKING OF LINES IN TELEGRAPH INSTALLATIONS
摘要
申请公布号
US3429998(A)
申请公布日期
1969.02.25
申请号
USD3429998
申请日期
1965.08.16
申请人
SIEMENS AG.
发明人
CHARLES J. COLOMBO
分类号
H04L12/26;H04L25/04;(IPC1-7):H04L25/02;H04L15/24;H04L15/34
主分类号
H04L12/26
代理机构
代理人
主权项
地址
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