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经营范围
发明名称
Improvements in or relating to thermionic valve circuits
摘要
申请公布号
GB563222(A)
申请公布日期
1944.08.03
申请号
GB19430001538
申请日期
1943.01.29
申请人
STANDARD TELEPHONES AND CABLES LIMITED;MAURICE MOISE LEVY
发明人
分类号
G05F1/607;H03F1/54
主分类号
G05F1/607
代理机构
代理人
主权项
地址
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