Cornelis M. A. Theunisse

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Dordrecht, NL

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Patents Grantslast 30 patents

Information Patent Grant
Combination of a loudspeaking telephone set and a hand set for soft...
- Patent number 4,396,799
- Issue date Aug 2, 1983
- U.S. Philips Corporation
- Klaas R. Franzen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE