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发明名称
Spring assembly
摘要
申请公布号
US2143742(A)
申请公布日期
1939.01.10
申请号
US19380203499
申请日期
1938.04.22
申请人
CHARLES KARR COMPANY
发明人
PRICE FRANK S.
分类号
A47C23/043
主分类号
A47C23/043
代理机构
代理人
主权项
地址
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