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经营范围
发明名称
SECURITY SYSTEMS
摘要
申请公布号
GB1502433(A)
申请公布日期
1978.03.01
申请号
GB19740022281
申请日期
1974.05.18
申请人
FERRANTI LTD
发明人
分类号
G07C9/00;G08B13/22;H04L25/49;(IPC1-7):G08B9/00
主分类号
G07C9/00
代理机构
代理人
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