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经营范围
发明名称
Improvements in or relating to carrier current signalling systems
摘要
申请公布号
GB522000(A)
申请公布日期
1940.06.06
申请号
GB19380031642
申请日期
1938.11.01
申请人
AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED;JOHN ERNEST THOMAS PARKER;JOSEPH BERNARD MCCUSKER
发明人
分类号
H03C1/56
主分类号
H03C1/56
代理机构
代理人
主权项
地址
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