Walter Grethe

Follow

Person

Koln, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Additional information for voice group call service
- Patent number 7,460,875
- Issue date Dec 2, 2008
- T. Mobile Deutschland GmbH
- Volker Brass
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Additional Information for Voice Group Call Service
- Publication number 20070224974
- Publication date Sep 27, 2007
- Volker Brass
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Short message for voice group call service
- Publication number 20070105569
- Publication date May 10, 2007
- T-Mobile Deutschland GmbH
- Volker Brass
- H04 - ELECTRIC COMMUNICATION TECHNIQUE