Loose leaf binder,申请号US19310569089-传众专利搜索

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发明名称	Loose leaf binder
摘要
申请公布号	US1914968(A)	申请公布日期	1933.06.20
申请号	US19310569089	申请日期	1931.10.15
申请人	BROWN HOMER B	发明人	BROWN HOMER B.
分类号	B42F13/12	主分类号	B42F13/12
代理机构		代理人
主权项
地址

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