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Patent:US6464504
| Patent: | US 6464504 |
| Title: | Mathematical game of amusement |
| Date: | 15.10.2002 |
| Place: | 11000 S. Eastern, Henderson, NV 89052 |
| Country: | USA |
| Person: | Wingert, Diane |
| Company: | |
| Internal Links: | Lehrmittel |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US6464504 (espacenet), US6464504 (uspto) |
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