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经营范围
发明名称
Improvements in or relating to selective electrical circuits
摘要
申请公布号
GB551228(A)
申请公布日期
1943.02.12
申请号
GB19410014798
申请日期
1941.11.18
申请人
BERTRAM MORTON HADFIELD
发明人
分类号
G01S13/02;H04B3/34;H04Q1/442
主分类号
G01S13/02
代理机构
代理人
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地址
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