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经营范围
发明名称
Signaling circuit
摘要
申请公布号
US2226230(A)
申请公布日期
1940.12.24
申请号
US19360113026
申请日期
1936.11.27
申请人
RADIO CORPORATION
发明人
LINSELL ALFRED AUBYN
分类号
H04N5/46
主分类号
H04N5/46
代理机构
代理人
主权项
地址
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