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发明名称
Attachment for watches
摘要
申请公布号
US1792904(A)
申请公布日期
1931.02.17
申请号
US19260142686
申请日期
1926.10.19
申请人
HANSON LOUIS S
发明人
HANSON LOUIS S.
分类号
G04B37/06
主分类号
G04B37/06
代理机构
代理人
主权项
地址
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