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发明名称
Book support
摘要
申请公布号
US1897305(A)
申请公布日期
1933.02.14
申请号
US19300492285
申请日期
1930.10.30
申请人
DOHERTY THOMAS A
发明人
DOHERTY THOMAS A.
分类号
A47B23/04
主分类号
A47B23/04
代理机构
代理人
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