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经营范围
发明名称
Ceramic vacuum tube
摘要
申请公布号
US2740067(A)
申请公布日期
1956.03.27
申请号
US19520314497
申请日期
1952.10.13
申请人
EITEL-MCCULLOUGH, INC.
发明人
SORG HAROLD E.
分类号
H01J21/36
主分类号
H01J21/36
代理机构
代理人
主权项
地址
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