Erhard Lehmann

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Munich, DE

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Patents Grantslast 30 patents

Information Patent Grant
Semiconductor power switch with thyristor
- Patent number 4,825,272
- Issue date Apr 25, 1989
- Siemens Aktiengesellschaft
- Erhard Lehmann
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Circuit arrangement for reducing the recovery time of a thyristor
- Patent number 4,255,675
- Issue date Mar 10, 1981
- Siemens Aktiengesellschaft
- Erhard Lehmann
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Thyristor having improved cooling and improved high frequency opera...
- Patent number 4,158,850
- Issue date Jun 19, 1979
- Siemens Aktiengesellschaft
- Erhard Lehmann
- H01 - BASIC ELECTRIC ELEMENTS