发明名称 Changeable message display system
摘要 A changeable message display system comprises a magnetically attractable signboard, a plurality of signs, and a sign support. The signboard has an outer perimeter that defines a generally planar sign-receiving surface. Each of the signs is formed of a unitary piece of flexible magnetic sheet material. Each of the signs has dimensions that are substantially the same as the sign-receiving surface of the signboard. Each of the signs is adapted for removable connection to the signboard by magnetic attraction in a manner so that, when connected, the sign is generally co-extensive with substantially the entire sign-receiving surface of the signboard.
申请公布号 US2005284011(A1) 申请公布日期 2005.12.29
申请号 US20040879993 申请日期 2004.06.29
申请人 TODD CURTIS L 发明人 TODD CURTIS L.
分类号 G09F7/04;G09F15/02;(IPC1-7):G09F15/02 主分类号 G09F7/04
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