Norman W. Ritchie

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Tulsa, OK, US

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Patents Grantslast 30 patents

Information Patent Grant
Filter-switched drive operating mode control
- Patent number 6,700,762
- Issue date Mar 2, 2004
- Baker Hughes Incorporated
- Michael Underwood
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
Filter-switched drive operating mode control
- Publication number 20020024783
- Publication date Feb 28, 2002
- BAKER HUGHES INCORPORATED
- Michael Underwood
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER