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经营范围
发明名称
Improvements in or relating to electrical frequency-dependent control means, primarily for radio apparatus
摘要
申请公布号
GB518480(A)
申请公布日期
1940.02.28
申请号
GB19380021912
申请日期
1938.07.23
申请人
JOHN EMYR RHYS-JONES;JOHN OSCAR GUY BARRETT;THE PLESSEY COMPANY LIMITED
发明人
分类号
H03J7/04
主分类号
H03J7/04
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