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发明名称
Multi-frequency signalling receivers
摘要
申请公布号
US3131264(A)
申请公布日期
1964.04.28
申请号
US19610100855
申请日期
1961.04.05
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
CHITTLEBURGH WILLIAM FRANCIS SIDNEY;SIMMONDS ERNEST SIDNEY
分类号
H04Q1/453
主分类号
H04Q1/453
代理机构
代理人
主权项
地址
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