Gyula Speck

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Budakeszi, HU

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Patents Grantslast 30 patents

Information Patent Grant
Single or multi-stage switching field for telephone exchanges
- Patent number 4,670,901
- Issue date Jun 2, 1987
- BHG Hiradastechnikai Vallalat
- Attila Nemeth
- H04 - ELECTRIC COMMUNICATION TECHNIQUE