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发明名称
Improvements relating to electric signalling systems
摘要
申请公布号
GB529652(A)
申请公布日期
1940.11.26
申请号
GB19390015365
申请日期
1939.05.24
申请人
KOLSTER - BRANDES LIMITED;WILLIAM ARNOLD BEATTY
发明人
分类号
H03K7/00
主分类号
H03K7/00
代理机构
代理人
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地址
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