Helfrick; David D.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Helfrick; David D..The latest application filed is for "variable mapping of nozzle rows to decrease dot placement artifacts of an inkjet printhead".
- Helfrick; David D. - San Diego CA
| Patent | Date |
|---|---|
| Variable mapping of nozzle rows to decrease dot placement artifacts of an inkjet printhead Grant 6,935,714 - Askeland , et al. August 30, 2 | 2005-08-30 |
| Disabling ink ejection elements to decrease dot placement artifacts in an inkjet printhead Grant 6,832,823 - Askeland , et al. December 21, 2 | 2004-12-21 |
| Variable Mapping Of Nozzle Rows To Decrease Dot Placement Artifacts Of An Inkjet Printhead App 20040239707 - Askeland, Ronald A. ; et al. | 2004-12-02 |
| Disabling Ink Ejection Elements To Decrease Dot Placement Artifacts In An Inkjet Printhead App 20040239708 - Askeland, Ronald A. ; et al. | 2004-12-02 |
| System and method for decreasing print banding with time delay synchronization of ejected ink Grant 6,698,858 - Askeland , et al. March 2, 2 | 2004-03-02 |
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