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发明名称
Improvements in or relating to electro-magnetic indicators
摘要
申请公布号
GB761247(A)
申请公布日期
1956.11.14
申请号
GB19530023115D
申请日期
1953.10.13
申请人
THE PLESSEY COMPANY LIMITED
发明人
SPREADBOROUGH JOHN
分类号
G08B5/24;H04M3/64
主分类号
G08B5/24
代理机构
代理人
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地址
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