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经营范围
发明名称
Loose leaf book
摘要
申请公布号
US2071768(A)
申请公布日期
1937.02.23
申请号
US19360081600
申请日期
1936.05.25
申请人
NATIONAL BLANK BOOK COMPANY
发明人
SCHADE JOHN
分类号
B42F13/28
主分类号
B42F13/28
代理机构
代理人
主权项
地址
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