Ralph R. Karsten

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St. Paul, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Inhibiting noise coupling across isolated power supplies
- Patent number 10,886,857
- Issue date Jan 5, 2021
- Ralph R. Karsten
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Audio amplifier circuit
- Patent number 10,469,042
- Issue date Nov 5, 2019
- Ralph R. Karsten
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Amplifier and preamplifier circuit
- Patent number 6,242,977
- Issue date Jun 5, 2001
- Atma-Sphere Music Systems, Inc.
- Ralph R. Karsten
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Audio power amplifier
- Patent number 4,719,431
- Issue date Jan 12, 1988
- Ralph R. Karsten
- H03 - BASIC ELECTRONIC CIRCUITRY

Patents Applicationslast 30 patents

Information Patent Application
AUDIO AMPLIFIER CIRCUIT
- Publication number 20190348957
- Publication date Nov 14, 2019
- Ralph R. Karsten
- H03 - BASIC ELECTRONIC CIRCUITRY