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经营范围
发明名称
Improvements in electric signalling or impulse transmitting mechanism
摘要
申请公布号
GB470008(A)
申请公布日期
1937.08.06
申请号
GB19360003598
申请日期
1936.02.06
申请人
ROBERT FISHER BROWN
发明人
分类号
G08B1/08
主分类号
G08B1/08
代理机构
代理人
主权项
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