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摘要
申请公布号
US1815624(A)
申请公布日期
1931.07.21
申请号
US19300497786
申请日期
1930.11.24
申请人
DEMPSTER KEILLOR JOSEPH
发明人
KEILLOR JOSEPH DEMPSTER
分类号
A44B5/00
主分类号
A44B5/00
代理机构
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