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Patent:US2294111
| Patent: | US 2294111 |
| Title: | Calculating Machine |
| Date: | 25.08.1942 |
| Place: | |
| Country: | USA |
| Person: | Friden, Carl Mauritz Fredrick (P) |
| Company: | Friden (P) |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2294111 (espacenet), US2294111 (uspto) |
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