Johann Mattfeld

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Obersulm, DE

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Patents Grantslast 30 patents

Information Patent Grant
Integrated complementary push-pull B final stage
- Patent number 4,879,522
- Issue date Nov 7, 1989
- Telefunken Electronic GmbH
- Johann Mattfeld
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Low-frequency amplifier
- Patent number 4,799,027
- Issue date Jan 17, 1989
- Telefunken Electronic GmbH
- Johann Mattfeld
- H03 - BASIC ELECTRONIC CIRCUITRY