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Patent:US3584780
| Patent: | US 3584780 |
| Title: | COLUMN CARRYING MECHANISM IN CALCULATAING MACHINE AND THE LIKE APPARATUS |
| Date: | 30.12.1969 |
| Place: | |
| Country: | USA |
| Person: | |
| Company: | Citizen (P) |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US3584780 (espacenet), US3584780 (uspto) |
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