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经营范围
发明名称
Frequency discriminator
摘要
申请公布号
US2231997(A)
申请公布日期
1941.02.18
申请号
US19380213589
申请日期
1938.06.14
申请人
RADIO PATENTS CORPORATION
发明人
GUANELLA GUSTAVE
分类号
H03D3/22
主分类号
H03D3/22
代理机构
代理人
主权项
地址
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