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发明名称
Spring assembly
摘要
申请公布号
US1897309(A)
申请公布日期
1933.02.14
申请号
US19280321311
申请日期
1928.11.23
申请人
CHARLES KARR COMPANY
发明人
KARR FRANCIS
分类号
A47C23/043
主分类号
A47C23/043
代理机构
代理人
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地址
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