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Patent:DE163935
| Patent: | DE 163935 |
| Title: | Kreisförmiger logarithmischer Rechenschieber mit einem Zählrädchen zur Ermittelung der Stellenzahl des Resultates |
| Date: | 19.10.1906 |
| Place: | Zwickau i.S. |
| Country: | Germany |
| Person: | Paul Petzoldt |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  DE163935 |
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