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发明名称
Art of radio signaling
摘要
申请公布号
US2055375(A)
申请公布日期
1936.09.22
申请号
US19320647053
申请日期
1932.12.13
申请人
LOUIS COHEN
发明人
COHEN LOUIS
分类号
H03B5/10
主分类号
H03B5/10
代理机构
代理人
主权项
地址
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