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发明名称
Spring assembly
摘要
申请公布号
US1744389(A)
申请公布日期
1930.01.21
申请号
US19270215923
申请日期
1927.08.27
申请人
FRANCIS KARR
发明人
KARR FRANCIS
分类号
A47C23/053
主分类号
A47C23/053
代理机构
代理人
主权项
地址
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