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Patent:DE74866
| Patent: | DE 74866 |
| Title: | Mess- und Rechenzirkel |
| Date: | 25.07.1893 |
| Place: | Neu-Kockendorf |
| Country: | Germany |
| Person: | Nitschmann, Franz (P) |
| Company: | |
| Internal Links: | Zirkel |
| Keywords: | |
| Link to the patent office: (without guarantee) |  DE74866 |
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