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经营范围
发明名称
Vacuum tube
摘要
申请公布号
US1993108(A)
申请公布日期
1935.03.05
申请号
US19270233519
申请日期
1927.11.15
申请人
MCILVAINE PATENT CORPORATION
发明人
MCILVAINE ORAN T.
分类号
H01J1/14;H01J19/30
主分类号
H01J1/14
代理机构
代理人
主权项
地址
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