Petrie Johan van der Plaats

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Hilversum, NL

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Patents Grantslast 30 patents

Information Patent Grant
Audio transmission circuit comprising a transmit amplifier in the f...
- Patent number 4,680,789
- Issue date Jul 14, 1987
- U.S. Philips Corporation
- Peter J. M. Sijbers
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Circuit arrangement for a tone pushbutton selection telephone subsc...
- Patent number 3,978,295
- Issue date Aug 31, 1976
- U.S. Philips Corporation
- Petrie Johan van der Plaats
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electronic telephone subscriber set with voltage controlled variabl...
- Patent number 3,973,082
- Issue date Aug 3, 1976
- U.S. Philips Corporation
- Petrie Johan van der Plaats
- H04 - ELECTRIC COMMUNICATION TECHNIQUE