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经营范围
发明名称
Sewing machine
摘要
申请公布号
US2497231(A)
申请公布日期
1950.02.14
申请号
US19440559579
申请日期
1944.10.20
申请人
WILLIAM R. DONALDSON
发明人
DONALDSON WILLIAM R.
分类号
D05B1/06
主分类号
D05B1/06
代理机构
代理人
主权项
地址
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