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发明名称
Public address stabilizing system
摘要
申请公布号
US2157177(A)
申请公布日期
1939.05.09
申请号
US19360113121
申请日期
1936.11.28
申请人
RADIO CORPORATION OF AMERICA
发明人
KELLOGG EDWARD W.
分类号
H04M9/08
主分类号
H04M9/08
代理机构
代理人
主权项
地址
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