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经营范围
发明名称
Incandescible cathode
摘要
申请公布号
US2700118(A)
申请公布日期
1955.01.18
申请号
US19510258892
申请日期
1951.11.29
申请人
NORTH AMERICAN PHILIPS COMPANY, INC.
发明人
HUGHES RAY C.;COPPOLA PATRICK P.;RITTNER EDMUND S.
分类号
H01J1/28
主分类号
H01J1/28
代理机构
代理人
主权项
地址
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