发明名称 Learning system with interlocking hexagonal control structures
摘要 A learning system is disclosed that comprises ordered pairs of interlocking cooperatively aligned hexagonal bosses and recesses having one or more peripherally disposed lobes as control structures to influence a user to connect or assemble articles or objects in a predetermined sequence or positional relationship.
申请公布号 US5447433(A) 申请公布日期 1995.09.05
申请号 US19930111593 申请日期 1993.08.17
申请人 PERRY, JR., CECIL M. 发明人 PERRY, JR., CECIL M.
分类号 G09B1/06;G09B1/36;G09B17/00;(IPC1-7):G09B1/36 主分类号 G09B1/06
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