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Patent:GB2364412
| Patent: | GB 2364412 |
| Title: | Abacus |
| Date: | 23.01.2002 |
| Place: | |
| Country: | Great Britain |
| Person: | Stone Celia Anne |
| Company: | |
| Internal Links: | Abakus, Kugelrechner, Lehrmittel |
| Keywords: | |
| Link to the patent office: (without guarantee) |  GB2364412 |
Aus der Patentschrift GB2364412
- Patent Family: ( Patent:GB0014950D, Patent:GB2364412, Patent:GB2364412 )