发明名称 |
Learning device |
摘要 |
A learning device includes a learning sheet having for each question a set of answers, only one of which is the correct answer. The sheet is mounted on a base plate having a series of conducting bands which are tortuous or undulating so that the correct answers corresponding to the appropriate associated conducting bands will not be arranged in a straight line nor made obvious to the person using the learning device.
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申请公布号 |
US4121355(A) |
申请公布日期 |
1978.10.24 |
申请号 |
US19770774584 |
申请日期 |
1977.03.07 |
申请人 |
GAKKEN CO., LTD. |
发明人 |
KIMOTO, CHISABURO;ITASAKA, KATSUHIKO;TANAKA, RYU;KIMURA, YOSHINOBU |
分类号 |
G09B7/06;G09B19/06;(IPC1-7):G09B7/06 |
主分类号 |
G09B7/06 |
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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