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Patent:GB691351
| Patent: | GB 691351 |
| Title: | Improved air navigational device for measurement of track error and computation of ground speed |
| Date: | 13.05.1953 |
| Place: | Kingston-on-Thames |
| Country: | Great Britain |
| Person: | Alfred Ernest Jones Norman Hayes |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  GB691351 |
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