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Patent:DE259669
| Patent: | DE 259669 |
| Title: | Zehnerschaltung für Rechenmaschinen |
| Date: | 15.10.1911 |
| Place: | Berlin |
| Country: | Germany |
| Person: | Knecht, Benno (P) |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  DE259669 |
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