Duff, Jr.; William B.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Duff, Jr.; William B..The latest application filed is for "method and assembly for insulating polarized device".
- Duff, Jr.; William B. - Odessa TX
| Patent | Date |
|---|---|
| Method and assembly for insulating polarized device Grant 7,521,900 - Duff, Jr. April 21, 2 | 2009-04-21 |
| Electrical charges storage device having enhanced power characteristics Grant 7,289,312 - Duff, Jr. October 30, 2 | 2007-10-30 |
| System for using polarized device with an AC induction motor Grant 7,245,110 - Duff, Jr. July 17, 2 | 2007-07-17 |
| Method and circuit for using polarized device in AC applications Grant 6,900,617 - Duff, Jr. May 31, 2 | 2005-05-31 |
| Method and circuit for using polarized device in AC applications Grant 6,633,154 - Duff, Jr. October 14, 2 | 2003-10-14 |
| Method and circuit for using polarized device in AC applications Grant 6,548,989 - Duff, Jr. April 15, 2 | 2003-04-15 |
| Method and circuit for using polarized device in AC applications Grant 6,548,988 - Duff, Jr. April 15, 2 | 2003-04-15 |
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