| Title: | 'Mathematics, nationality and language' playing cards | ||
| Application Number: | 97113375 | Application Date: | 1997.08.06 |
| Publication Number: | 1207542 | Publication Date: | 1999.02.10 |
| Approval Pub. Date: | Granted Pub. Date: | ||
| International Classifi-cation: | G09B19/22 | ||
| Applicant(s) Name: | Xue Jianying | Address: | 472100 |
| Inventor(s) Name: | |||
| Attorney & Agent: | |||
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Abstract: |
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| Time: | 7 | ||
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