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Patent:DE811622
| Patent: | DE 811622 |
| Title: | Nullstelleinrichtung für Planimeter und planimeterähnliche Geräte |
| Date: | 23.08.1951 |
| Place: | Nesselwang bei Kempten |
| Country: | Germany |
| Person: | |
| Company: | Emilie Riedle, geb. Pletzer |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  DE811622 |
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