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Patent:US865808
| Patent: | US 865808 |
| Title: | Calculating Machine |
| Date: | 10.09.1907 |
| Place: | |
| Country: | USA |
| Person: | B. F. Stump |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US865808 (espacenet), US865808 (uspto) |
Aus der Patentschrift US865808