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经营范围
发明名称
Improvements in clocks
摘要
申请公布号
GB550550(A)
申请公布日期
1943.01.13
申请号
GB19410011305
申请日期
1941.09.04
申请人
CHARLES THORN DRUMMOND
发明人
分类号
G04C15/00
主分类号
G04C15/00
代理机构
代理人
主权项
地址
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