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经营范围
发明名称
Elektrisches Signalsystem
摘要
申请公布号
DE926078(C)
申请公布日期
1955.04.07
申请号
DE1952B021294
申请日期
1952.07.23
申请人
BRITISH TELECOMMUNICATIONS RESEARCH LIMITED
发明人
BAKER GEORGE THOMAS;MANN VICTOR EDMUND
分类号
H04Q3/42
主分类号
H04Q3/42
代理机构
代理人
主权项
地址
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