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发明名称
Portable clock
摘要
申请公布号
US2970426(A)
申请公布日期
1961.02.07
申请号
US19590807954
申请日期
1959.04.21
申请人
GUIDO KOTTMANN
发明人
KOTTMANN GUIDO
分类号
G04B37/00
主分类号
G04B37/00
代理机构
代理人
主权项
地址
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