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Patent:GB147113
| Patent: | GB 147113 |
| Title: | Adding and Subtracting Apparatus |
| Date: | 29.09.1915 |
| Place: | |
| Country: | Great Britain |
| Person: | Trinks, Franz (P) |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  GB147113 |
Aus der Patentschrift GB147113