Richard E. Griessel

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Derry, NH, US

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Patents Grantslast 30 patents

Information Patent Grant
Transformerless, load adaptive speed controller
- Patent number 6,879,053
- Issue date Apr 12, 2005
- Youtility, INC
- Richard Shaun Welches
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Inverter DC link volts “tooth” modulation scheme
- Patent number 6,654,261
- Issue date Nov 25, 2003
- Youtility, INC
- Richard Shaun Welches
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
Hybrid variable speed generator/uninterruptible power supply power...
- Publication number 20040084965
- Publication date May 6, 2004
- Richard Shaun Welches
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
Inverter DC link volts "tooth" modulation scheme
- Publication number 20030012038
- Publication date Jan 16, 2003
- Richard S. Welches
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Local area grid for distributed power
- Publication number 20020036430
- Publication date Mar 28, 2002
- Richard S. Welches
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC