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发明名称
Book stand
摘要
申请公布号
US1840620(A)
申请公布日期
1932.01.12
申请号
US19280293162
申请日期
1928.07.16
申请人
DENNIS WILLIAM J
发明人
DENNIS WILLIAM J.
分类号
A47B23/04
主分类号
A47B23/04
代理机构
代理人
主权项
地址
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