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经营范围
发明名称
Improvements in or relating to dart boards
摘要
申请公布号
GB503045(A)
申请公布日期
1939.03.30
申请号
GB19380004901
申请日期
1938.02.17
申请人
JOHN ARTHUR ELLAM
发明人
分类号
F41J3/00
主分类号
F41J3/00
代理机构
代理人
主权项
地址
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