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Patent:US2071880
| Patent: | US 2071880 |
| Title: | Printing adding machine |
| Date: | 23.02.1937 |
| Place: | Zella-Mehlis |
| Country: | USA |
| Person: | Hugo Kämmel |
| Company: | Mercedes (P) Buromaschinen-Werke AG |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2071880 (espacenet), US2071880 (uspto) |
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