| 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 (http://v3.espacenet.com/textdoc?DB=EPODOC&F=0&IDX=GB580252) |
Aus der Patentschrift GB580252
- ok