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发明名称
Torsion-spring for clocks, watches, etc.
摘要
申请公布号
US1931251(A)
申请公布日期
1933.10.17
申请号
US19300436650
申请日期
1930.03.17
申请人
THE NEW HAVEN CLOCK COMPANY
发明人
CHAMBERLAIN THOMAS H.
分类号
C22C38/40
主分类号
C22C38/40
代理机构
代理人
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