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发明名称
Frequency indicator
摘要
申请公布号
US2189848(A)
申请公布日期
1940.02.13
申请号
US19370153718
申请日期
1937.07.15
申请人
HAZELTINE CORPORATION
发明人
WHEELER HAROLD A.
分类号
H03J1/04
主分类号
H03J1/04
代理机构
代理人
主权项
地址
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