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经营范围
发明名称
Improvements in or relating to travelling wave amplifying waves
摘要
申请公布号
GB663728(A)
申请公布日期
1951.12.27
申请号
GB19470028840
申请日期
1947.10.29
申请人
COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL
发明人
分类号
H01J25/36;H01J25/44
主分类号
H01J25/36
代理机构
代理人
主权项
地址
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