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经营范围
发明名称
Improvements in indicator boards and the like
摘要
申请公布号
GB496915(A)
申请公布日期
1938.12.08
申请号
GB19380008253
申请日期
1938.03.17
申请人
MAX KREEKER
发明人
分类号
G08B5/02
主分类号
G08B5/02
代理机构
代理人
主权项
地址
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