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发明名称
Improvements in and relating to frequency-changing circuits
摘要
申请公布号
GB868995(A)
申请公布日期
1961.05.25
申请号
GB19570041699
申请日期
1958.12.24
申请人
BRITISH TELECOMMUNICATIONS RESEARCH LIMITED
发明人
KOHN CZESLAW TEODOR
分类号
H03D7/12
主分类号
H03D7/12
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代理人
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