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发明名称
Expansion bracelet
摘要
申请公布号
US2740569(A)
申请公布日期
1956.04.03
申请号
US19540421484
申请日期
1954.04.07
申请人
ESCO JEWELERS
发明人
BOHLINGER ERNST ADOLF;FRIEDMAN SAMUEL
分类号
A44C5/00;G04B37/00;G04B37/14
主分类号
A44C5/00
代理机构
代理人
主权项
地址
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