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Patent:US780853
| Patent: | US 780853 |
| Title: | Adding and Subtracting Machine |
| Date: | 24.01.1905 |
| Place: | |
| Country: | USA |
| Person: | M. E. Anderson |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US780853 (espacenet), US780853 (uspto) |
Aus der Patentschrift US780853