发明名称 |
EDUCATIONAL APPARATUS |
摘要 |
|
申请公布号 |
GB8702043(D0) |
申请公布日期 |
1987.03.04 |
申请号 |
GB19870002043 |
申请日期 |
1987.01.30 |
申请人 |
HAYES, J J;SWIFT, M |
发明人 |
|
分类号 |
G09B1/20 |
主分类号 |
G09B1/20 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
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