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发明名称
速算练簿
摘要
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申请公布号
CN3332987D
申请公布日期
2003.10.29
申请号
CN03316484.3
申请日期
2003.05.15
申请人
李文学
发明人
李文学
分类号
19-04
主分类号
19-04
代理机构
南京苏科专利代理有限责任公司
代理人
牛莉莉
主权项
地址
210012江苏省南京市秦淮区洪家园阳光里小区5-24-102室
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