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发明名称
Improvements in or relating to wireless signalling systems
摘要
申请公布号
GB391491(A)
申请公布日期
1933.05.01
申请号
GB19310030086
申请日期
1931.10.30
申请人
JOHN PAUL CUSSONS DONE;QUENTIN CHARLES ALEXANDER CRAUFURD
发明人
分类号
H01Q1/44
主分类号
H01Q1/44
代理机构
代理人
主权项
地址
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