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经营范围
发明名称
Amplifier and oscillator valve or tube
摘要
申请公布号
US2226945(A)
申请公布日期
1940.12.31
申请号
US19360117909
申请日期
1936.12.28
申请人
COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL
发明人
ROCARD YVES
分类号
H03B5/10
主分类号
H03B5/10
代理机构
代理人
主权项
地址
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