Wolfgang Roper

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Wolpertshausen, DE

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Patents Grantslast 30 patents

Information Patent Grant
Speakerphone device with auxiliary circuit for eliminating clicking...
- Patent number 5,515,431
- Issue date May 7, 1996
- Temic Telefunken Microelectronic GmbH
- Joachim Kuhnle
- H04 - ELECTRIC COMMUNICATION TECHNIQUE