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发明名称
Measuring circuits
摘要
申请公布号
US2691064(A)
申请公布日期
1954.10.05
申请号
US19500145362
申请日期
1950.02.21
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
SHEPHERD JUDSON O'D.
分类号
H04M3/12
主分类号
H04M3/12
代理机构
代理人
主权项
地址
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