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发明名称
Frequency detector
摘要
申请公布号
US2603748(A)
申请公布日期
1952.07.15
申请号
US19460678223
申请日期
1946.06.21
申请人
BELL JR PERSA R
发明人
JR. PERSA R. BELL,
分类号
H03D3/10
主分类号
H03D3/10
代理机构
代理人
主权项
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