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Patent:DE580738
| Patent: | DE 580738 |
| Title: | Nullendruckvorrichtung für Rechenmaschinen, Kontrollkassen u. dgl. |
| Date: | 15.07.1933 |
| Place: | Essen |
| Country: | Germany |
| Person: | Varren, Alexander (P) |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  DE580738 |
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