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Patent:GB580252
| Patent: | GB 580252 |
| Title: | Improvements in or relating to calculating instruments |
| Date: | 02.09.1946 |
| Place: | |
| Country: | Great Britain |
| Person: | Dora Minna Liebmann und Gerhard Liebmann |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  GB580252 |
Aus der Patentschrift GB580252
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