Oskar Zumkeller

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Villingen-Schwenningen, DE

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Patents Grantslast 30 patents

Information Patent Grant
Push button for a value input keyboard
- Patent number 4,924,045
- Issue date May 8, 1990
- Mannesmann Kienzle GmbH
- Oskar Zumkeller
- G05 - CONTROLLING REGULATING
Information Patent Grant
Push button for an inductive value input keyboard
- Patent number 4,853,666
- Issue date Aug 1, 1989
- Mannesmann Kienzle GmbH
- Hugo Fesenmeier
- H03 - BASIC ELECTRONIC CIRCUITRY