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Patent:GB516557
| Patent: | GB 516557 |
| Title: | comptometer-like adding machine |
| Date: | 04.01.1940 |
| Place: | |
| Country: | Great Britain |
| Person: | Webb, Christopher Frederick (P) |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  GB516557 |
Aus der Patentschrift GB516557