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Patent:AT90971B
| Patent: | AT 90971B |
| Title: | Addiermaschine |
| Date: | 02.06.1922 |
| Place: | Niklasdorf bei Ziegenhals |
| Country: | Austria |
| Person: | Krause, Rudolf |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  AT90971B |
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