Duffey; Christopher K.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Duffey; Christopher K..The latest application filed is for "variable speed synchronous generator".
- Duffey; Christopher K. - Clackamas OR
| Patent | Date |
|---|---|
| Variable speed synchronous generator Grant 8,125,095 - Duffey , et al. February 28, 2 | 2012-02-28 |
| System for generating constant speed output from variable speed input Grant 7,851,933 - Duffey , et al. December 14, 2 | 2010-12-14 |
| Variable Speed Synchronous Generator App 20090315329 - Duffey; Christopher K. ; et al. | 2009-12-24 |
| System For Generating Constant Speed Output From Variable Speed Input App 20080223684 - Duffey; Christopher K. ; et al. | 2008-09-18 |
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