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发明名称
Electric signal modulator
摘要
申请公布号
US2640973(A)
申请公布日期
1953.06.02
申请号
US19490069352
申请日期
1949.01.05
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
CLEAVER RICHARD FRANCIS;GRAY THOMAS DUNCAN
分类号
G01S3/14;H03K12/00
主分类号
G01S3/14
代理机构
代理人
主权项
地址
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