发明名称 PORTABLE WRITING BOARD SYSTEM
摘要 A portable writing system comprising an assembly of panels, at least one of which has a writing surface thereon, connected by joints which may be repeatedly rearranged from an open or use configuration to a closed or transport configuration, providing exceptional convenience and portability.
申请公布号 US2010267001(A1) 申请公布日期 2010.10.21
申请号 US20100750868 申请日期 2010.03.31
申请人 3M INNOVATIVE PROPERTIES COMPANY 发明人 SUGAI NAOHITO
分类号 B43L1/00 主分类号 B43L1/00
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