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经营范围
发明名称
Multiplex frequency modulation transmitter
摘要
申请公布号
US2773125(A)
申请公布日期
1956.12.04
申请号
US19530385483
申请日期
1953.10.12
申请人
ARMSTRONG ESTHER M
发明人
ARMSTRONG ESTHER M.
分类号
H04J1/12
主分类号
H04J1/12
代理机构
代理人
主权项
地址
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