Patent US 2756394
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| Patent number | US 2756394 |
|---|---|
| Title | Delay cables |
| Inventors | Josef Sieven, Hannoyer-Keefeld, and Ernst Scheffler |
| Company | Hackethal Draht-und Kabel Werke |
| Filing date | 1953-07-14 |
| Grant date | 1956-07-24 |
| Cites |