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Patent:DE61509
| Patent: | DE 61509 |
| Title: | Zirkel zur Bestimmung von Marschzeiten |
| Date: | 30.08.1891 |
| Place: | |
| Country: | Germany |
| Person: | Brenske, Carl (P) |
| Company: | |
| Internal Links: | Zirkel |
| Keywords: | |
| Link to the patent office: (without guarantee) |  DE61509 |
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