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Patent:DE305251
| Patent: | DE 305251 |
| Title: | Rechenmaschine mit Signalvorrichtung |
| Date: | 13.09.1917 |
| Place: | Braunschweig |
| Country: | Germany |
| Person: | Trinks, Franz (P) |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  DE305251 |
s. auch Patent:DE307532