Duffield; John P.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Duffield; John P..The latest application filed is for "apparatus and methods for water-based ink printing".
- Duffield; John P. - Meredith NH
| Patent | Date |
|---|---|
| Gas removal from a fluid delivery system Grant 8,807,727 - Duffield , et al. August 19, 2 | 2014-08-19 |
| Reduced gloss banding through low ink volume deposition per print pass Grant 8,672,451 - Lahut , et al. March 18, 2 | 2014-03-18 |
| Apparatus And Methods For Water-based Ink Printing App 20080316236 - Duffield; John P. | 2008-12-25 |
| Apparatus and methods for water-based ink printing Grant 7,396,119 - Duffield July 8, 2 | 2008-07-08 |
| Apparatus And Methods For Water-based Ink Printing App 20060221157 - Duffield; John P. | 2006-10-05 |
| Water-based ink jet printer Grant 7,090,327 - Duffield August 15, 2 | 2006-08-15 |
| Wet capping tray for ink jet printheads Grant 6,905,189 - Duffield June 14, 2 | 2005-06-14 |
| Multi-color, multi-speed printing apparatus Grant 6,786,578 - Aschman , et al. September 7, 2 | 2004-09-07 |
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