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经营范围
发明名称
Multifrequency transmission
摘要
申请公布号
US1957269(A)
申请公布日期
1934.05.01
申请号
US19310565932
申请日期
1931.09.30
申请人
WIRED RADIO, INC.
发明人
HUND AUGUST
分类号
H04H20/84
主分类号
H04H20/84
代理机构
代理人
主权项
地址
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