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Patent:GB254588
| Patent: | GB 254588 |
| Title: | A device for indirectly laying anti-aircraft guns |
| Date: | 05.07.1926 |
| Place: | Den Helder |
| Country: | Great Britain |
| Person: | Willem Frederik Grotendorst |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  GB254588 |
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