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摘要
申请公布号
US1811124(A)
申请公布日期
1931.06.23
申请号
US19290414608
申请日期
1929.12.16
申请人
GINN AND COMPANY
发明人
GREELEY WILLIAM H.
分类号
A47B23/04
主分类号
A47B23/04
代理机构
代理人
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