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发明名称
Reception of varying frequency signals
摘要
申请公布号
US1876746(A)
申请公布日期
1932.09.13
申请号
US19290364221
申请日期
1929.05.18
申请人
JOHN HAYS HAMMOND, JR.
发明人
PURINGTON ELLISON S.
分类号
H04L27/06
主分类号
H04L27/06
代理机构
代理人
主权项
地址
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