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发明名称
ELECTRIC SIGNALLING SYSTEMS
摘要
申请公布号
IE18116(L)
申请公布日期
1947.11.10
申请号
IE19470000228
申请日期
1947.04.17
申请人
STANDARD TELEPHONES AND CABLES LTD;ROLAND HARRIS DUNN
发明人
分类号
(IPC1-7):H03K13/02
主分类号
(IPC1-7):H03K13/02
代理机构
代理人
主权项
地址
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