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发明名称
Book-identification device
摘要
申请公布号
US1760574(A)
申请公布日期
1930.05.27
申请号
US19280323166
申请日期
1928.12.01
申请人
WRIGHT WILLIAM J
发明人
WRIGHT WILLIAM J.
分类号
B42F13/00
主分类号
B42F13/00
代理机构
代理人
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