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Patent:CH142203
| Patent: | CH 142203 |
| Title: | Rechenapparat |
| Date: | 15.09.1930 |
| Place: | Papiermühle b. Bern |
| Country: | Switzerland |
| Person: | Hirt, Fritz; Racine, Fritz |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  CH142203 |
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