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经营范围
发明名称
Ceramic electron tube
摘要
申请公布号
US2880349(A)
申请公布日期
1959.03.31
申请号
US19540437416
申请日期
1954.06.17
申请人
EITELMCCULLOUGH, INC.
发明人
POLESE JAMES P.
分类号
H01J19/34
主分类号
H01J19/34
代理机构
代理人
主权项
地址
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