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发明名称
Filament supply system
摘要
申请公布号
US2318948(A)
申请公布日期
1943.05.11
申请号
US19400366583
申请日期
1940.11.22
申请人
RADIO CORPORATION OF AMERICA
发明人
KOCH WINFIELD R.
分类号
H03F1/06;H04B1/16
主分类号
H03F1/06
代理机构
代理人
主权项
地址
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