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发明名称
Extension device
摘要
申请公布号
US1964216(A)
申请公布日期
1934.06.26
申请号
US19320635928
申请日期
1932.10.03
申请人
HELEN SARGENT
发明人
SARGENT HELEN
分类号
A47C7/50
主分类号
A47C7/50
代理机构
代理人
主权项
地址
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