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发明名称
DOUBLE CURRENT TELEGRAPH SIGNAL TRANSMITTER
摘要
申请公布号
GB1264004(A)
申请公布日期
1972.02.16
申请号
GB19690023240
申请日期
1969.05.07
申请人
CREED & COMPANY LIMITED
发明人
ARNOLD LONGWORTH;RICHARD CHARLES POORE;DAVID ERIC ALFRED COLES;BRIAN MICHAEL PATIENCE
分类号
H04L25/24
主分类号
H04L25/24
代理机构
代理人
主权项
地址
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