Loose-leaf binder,申请号US19390269556-传众专利搜索

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发明名称	Loose-leaf binder
摘要
申请公布号	US2244176(A)	申请公布日期	1941.06.03
申请号	US19390269556	申请日期	1939.04.24
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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