| 发明名称 |
初级英语时态练牌 |
| 摘要 |
省略其它视图。 |
| 申请公布号 |
CN3009554S |
申请公布日期 |
1991.05.15 |
| 申请号 |
CN90302973.1 |
申请日期 |
1990.10.10 |
| 申请人 |
傅玉侬 |
发明人 |
傅玉侬 |
| 分类号 |
21-01-T0272 |
主分类号 |
21-01-T0272 |
| 代理机构 |
三友专利事务所 |
代理人 |
张耀山 |
| 主权项 |
|
| 地址 |
101601北京市东燕郊地震技术专科学校 |
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