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经营范围
发明名称
Improvements in or relating to automatic or semi-automatic telephone systems
摘要
申请公布号
GB324982(A)
申请公布日期
1930.02.10
申请号
GB19280032648
申请日期
1928.11.08
申请人
STANDARD TELEPHONES AND CABLES, LIMITED;ESMOND PHILIP GOODWIN WRIGHT
发明人
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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