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经营范围
发明名称
Construction of casings for books and particularly loose leaf binders
摘要
申请公布号
US2024882(A)
申请公布日期
1935.12.17
申请号
US19340758755
申请日期
1934.12.22
申请人
NATIONAL BLANK BOOK COMPANY
发明人
SCHADE FRANK STANLEY
分类号
B42F13/00
主分类号
B42F13/00
代理机构
代理人
主权项
地址
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