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发明名称
Book rest and copy holder
摘要
申请公布号
US2192574(A)
申请公布日期
1940.03.05
申请号
US19380217246
申请日期
1938.07.02
申请人
ARTHUR HANCHER
发明人
HANCHER ARTHUR
分类号
A47B23/04;A47B23/06
主分类号
A47B23/04
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