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经营范围
发明名称
Improvements in and relating to telegraphic trunk switching systems
摘要
申请公布号
GB436624(A)
申请公布日期
1935.10.15
申请号
GB19350004370
申请日期
1935.02.11
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
分类号
H04L12/00;H04M11/06
主分类号
H04L12/00
代理机构
代理人
主权项
地址
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