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经营范围
发明名称
Waterproof watch crown
摘要
申请公布号
US2479348(A)
申请公布日期
1949.08.16
申请号
US19440549813
申请日期
1944.08.17
申请人
GREENBERG CHARLES B
发明人
GREENBERG CHARLES B.
分类号
G04B37/10
主分类号
G04B37/10
代理机构
代理人
主权项
地址
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