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发明名称
Wrist watch attachment
摘要
申请公布号
US2509428(A)
申请公布日期
1950.05.30
申请号
US19490124908
申请日期
1949.11.01
申请人
WALLACE GREENE
发明人
GREENE WALLACE
分类号
G04B37/14
主分类号
G04B37/14
代理机构
代理人
主权项
地址
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