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经营范围
发明名称
Balance wheel and hairspring holder
摘要
申请公布号
US2707890(A)
申请公布日期
1955.05.10
申请号
US19530334048
申请日期
1953.01.29
申请人
BOLTON WILBERT V
发明人
BOLTON WILBERT V.
分类号
G04D1/06;G04D3/00
主分类号
G04D1/06
代理机构
代理人
主权项
地址
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