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摘要
申请公布号
US1767397(A)
申请公布日期
1930.06.24
申请号
US19280282495
申请日期
1928.06.02
申请人
A. F. HUBBERT;G. A. CRITTENDEN
发明人
RAGLAND JACK R.
分类号
A47F5/00
主分类号
A47F5/00
代理机构
代理人
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