发明名称 |
Display polyhedra having marked and unmarked paired opposing faces |
摘要 |
A polyhedra for emulating an object or other phenomena with marked surfaces, includes a plurality of faces, some with markings and some being blank. The surfaces are arranged about the polyhedra so that each marked face is opposite a blank face. The polyhedra may be used for conducting and/or demonstrating the principles of probability in conjunction with a projection device.
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申请公布号 |
US5385473(A) |
申请公布日期 |
1995.01.31 |
申请号 |
US19930145998 |
申请日期 |
1993.11.01 |
申请人 |
CUISENAIRE COMPANY OF AMERICA, INC. |
发明人 |
VELTMAN, JOHN |
分类号 |
G09B23/02;(IPC1-7):G09B19/02 |
主分类号 |
G09B23/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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