发明名称 Kit with integral sketching device
摘要 A kit for guiding a user is drawing a trace includes a sketching device coupled to a paper tablet. The sketching device comprises a first pattern of raised bumps sized and positioned to form a plurality of intersecting grooves along the surface of the sketching device.
申请公布号 US8057232(B2) 申请公布日期 2011.11.15
申请号 US20090490123 申请日期 2009.06.23
申请人 HABERSTROH CHARLES;HABERSTROH MARTIN P. 发明人 HABERSTROH CHARLES;HABERSTROH MARTIN P.
分类号 G09B11/00 主分类号 G09B11/00
代理机构 代理人
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