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发明名称
Frequency indication system
摘要
申请公布号
US2857566(A)
申请公布日期
1958.10.21
申请号
US19530401195
申请日期
1953.12.30
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
BLAKE JOHN T.
分类号
G01R27/32
主分类号
G01R27/32
代理机构
代理人
主权项
地址
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