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发明名称
Graduated tension regulator for sewing machines
摘要
申请公布号
US1820119(A)
申请公布日期
1931.08.25
申请号
US19300450952
申请日期
1930.05.09
申请人
THE SINGER MANUFACTURING COMPANY
发明人
CHASON DANIEL H.
分类号
D05B47/00
主分类号
D05B47/00
代理机构
代理人
主权项
地址
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