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发明名称
RADIO FREQUENCY COMMUNICATION SYSTEMS
摘要
申请公布号
GB1248223(A)
申请公布日期
1971.09.29
申请号
GB19680008226
申请日期
1968.02.20
申请人
COAL INDUSTRY (PATENTS) LIMITED
发明人
DAVID JAMES REGINALD MARTIN
分类号
H04B5/00
主分类号
H04B5/00
代理机构
代理人
主权项
地址
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