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Patent:US2401473
| Patent: | US 2401473 |
| Title: | Calculating Machine |
| Date: | 04.06.1946 |
| Place: | |
| Country: | USA |
| Person: | Friden, Carl Mauritz Fredrick (P) et al |
| Company: | Friden (P) |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2401473 (espacenet), US2401473 (uspto) |
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