Hans-Joachim Viebrantz

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Bad Neustadt/Saale, DE

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Patents Grantslast 30 patents

Information Patent Grant
Touch contact switch
- Patent number 4,952,761
- Issue date Aug 28, 1990
- Preh-Werke GmbH & Co. KG
- Hans-Joachim Viebrantz
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Housing for a hand-held remote control transmitter
- Patent number 4,768,230
- Issue date Aug 30, 1988
- Preh Elektrofeinmechanische Werke Jakob Preh Nachf. GmbH & Co.
- Hans-Joachim Viebrantz
- G07 - CHECKING-DEVICES
Information Patent Grant
Keyboard with improved key design permitting tilting about either side
- Patent number 4,493,959
- Issue date Jan 15, 1985
- Preh Elektrofeinmechanische Werke Jakob Preh Nachf., GmbH & Co.
- Hans-Joachim Viebrantz
- H01 - BASIC ELECTRIC ELEMENTS