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Patent:US6079983
| Patent: | US 6079983 |
| Title: | Educational instrument for numbers |
| Date: | 27.06.2000 |
| Place: | |
| Country: | USA |
| Person: | Kane, Jr., James T. (94 Adams St. #108, Waltham, MA 02453) |
| Company: | |
| Internal Links: | Lehrmittel |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US6079983 (espacenet), US6079983 (uspto) |
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