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经营范围
发明名称
Improvements in or relating to telephone systems
摘要
申请公布号
GB784678(A)
申请公布日期
1957.10.16
申请号
GB19560015505
申请日期
1956.05.18
申请人
AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED
发明人
CURTIS GERALD;ROBINSON PETER RUSSELL
分类号
H04Q3/62
主分类号
H04Q3/62
代理机构
代理人
主权项
地址
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