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经营范围
发明名称
Improvements in or relating to circuit arrangement for impulse control in telephone installations
摘要
申请公布号
GB703716(A)
申请公布日期
1954.02.10
申请号
GB19510012948
申请日期
1951.05.31
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
FUHRER R.
分类号
H04Q1/50
主分类号
H04Q1/50
代理机构
代理人
主权项
地址
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