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发明名称
Improvements relating to voice-frequency signal detectors
摘要
申请公布号
GB890454(A)
申请公布日期
1962.02.28
申请号
GB19590040236
申请日期
1959.11.26
申请人
ASSOCIATED ELECTRICAL INDUSTRIES LIMITED
发明人
KING DANIEL LAWRENCE;HITCH ERIC GIBBON
分类号
H04Q1/446
主分类号
H04Q1/446
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代理人
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