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Patent:CH146298
| Patent: | CH 146298 |
| Title: | Règle à calculs de poche |
| Date: | 01.07.1931 |
| Place: | Lausanne |
| Country: | Switzerland |
| Person: | Raymond Cartier |
| Company: | |
| Internal Links: | Rechenschieber, logarithmisch |
| Keywords: | |
| Link to the patent office: (without guarantee) |  CH146298 |
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