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经营范围
发明名称
Incandescent cathode discharge tube
摘要
申请公布号
US1838888(A)
申请公布日期
1931.12.29
申请号
US19270194924
申请日期
1927.05.28
申请人
RADIO CORPORATION
发明人
GESSEL KAREL MARINUS VAN
分类号
H01J1/16
主分类号
H01J1/16
代理机构
代理人
主权项
地址
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