Klaus Willemsen

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Wedermark, DE

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Patents Grantslast 30 patents

Information Patent Grant
Antenna unit for wireless audio transmission
- Patent number 8,907,856
- Issue date Dec 9, 2014
- Sennheiser electronic GmbH & Co. KG
- Matthias Fehr
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Infrared headphones for the hearing impaired
- Patent number 4,633,498
- Issue date Dec 30, 1986
- Sennheiser Electronic KG
- Egon F. Warnke
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Multi-channel Wireless Microphone System
- Publication number 20160212558
- Publication date Jul 21, 2016
- SENNHEISER ELECTRONIC GMBH & CO. KG
- Klaus Willemsen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
ANTENNA UNIT FOR WIRELESS AUDIO TRANSMISSION
- Publication number 20110080328
- Publication date Apr 7, 2011
- SENNHEISER ELECTRONIC GMBH & CO. KG
- Matthias Fehr
- H01 - BASIC ELECTRIC ELEMENTS