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发明名称
Book cover and index
摘要
申请公布号
US1993351(A)
申请公布日期
1935.03.05
申请号
US19330668697
申请日期
1933.05.01
申请人
NATIONAL BLANK BOOK COMPANY
发明人
SCHADE JOHN
分类号
B42F21/00
主分类号
B42F21/00
代理机构
代理人
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