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经营范围
发明名称
Improvements in variable thermionic impedances
摘要
申请公布号
GB450136(A)
申请公布日期
1936.07.06
申请号
GB19360010132
申请日期
1934.12.04
申请人
MURPHY RADIO LIMITED;GEOFFREY BERNARD BAKER;GEORGE FREDERICK HAWKINS
发明人
分类号
H03C3/14
主分类号
H03C3/14
代理机构
代理人
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