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Patent:US2277250
| Patent: | US 2277250 |
| Title: | Bookkeeping machine |
| Date: | 24.03.1942 |
| Place: | Stockholm und New York |
| Country: | USA |
| Person: | Ernst Vilhelm Nyberg |
| Company: | Ekonomiregister |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2277250 (espacenet), US2277250 (uspto) |
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