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Patent:US847904
| Patent: | US 847904 |
| Title: | Spring Load Computer |
| Date: | 19.03.1907 |
| Place: | |
| Country: | USA |
| Person: | F. K. Caswell |
| Company: | |
| Internal Links: | Rechenscheibe |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US847904 (espacenet), US847904 (uspto) |
Aus der Patentschrift US847904