Roelof A. Marissen

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Den Haag, NL

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Patents Grantslast 30 patents

Information Patent Grant
Electret assembly for a microphone having a backplate with improved...
- Patent number 8,280,082
- Issue date Oct 2, 2012
- Sonion Nederland B.V.
- Aart Z. van Halteren
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electret assembly for a microphone having a backplate with improved...
- Patent number 7,684,575
- Issue date Mar 23, 2010
- Sonion Nederland B.V.
- Aart Z. van Halteren
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electret assembly for a microphone having a backplate with improved...
- Patent number 7,136,496
- Issue date Nov 14, 2006
- Sonion Nederland B.V.
- Aart Z. van Halteren
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Electret Assembly For A Microphone Having A Backplate With Improved...
- Publication number 20100172521
- Publication date Jul 8, 2010
- Sonion Nederland BV
- Aart Z. van Halteren
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Electret assembly for a microphone having a backplate with improved...
- Publication number 20070121982
- Publication date May 31, 2007
- Aart Z. van Halteren
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Electret assembly for a microphone having a backplate with improved...
- Publication number 20030076970
- Publication date Apr 24, 2003
- Aart Z. van Halteren
- H04 - ELECTRIC COMMUNICATION TECHNIQUE