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发明名称
Hairspring assembly for timepieces
摘要
申请公布号
US2057642(A)
申请公布日期
1936.10.13
申请号
US19350022380
申请日期
1935.05.20
申请人
BARTON EDDISON WILLIAM;MCADAM JOHN V
发明人
EDDISON WILLIAM BARTON;MCADAM JOHN V.
分类号
G04B17/34
主分类号
G04B17/34
代理机构
代理人
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地址
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