DH

David D. Helfrick

HP HP: 3 patents #4,446 of 16,619Top 30%
📍 San Diego, CA: #9,825 of 23,606 inventorsTop 45%
🗺 California: #149,087 of 386,348 inventorsTop 40%
Overall (All Time): #1,600,336 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6935714 Variable mapping of nozzle rows to decrease dot placement artifacts of an inkjet printhead Ronald A. Askeland, James A. Feinn, Jason R. Arbeiter, Jason Quintana 2005-08-30
6832823 Disabling ink ejection elements to decrease dot placement artifacts in an inkjet printhead Ronald A. Askeland, James A. Feinn, Jason R. Arbeiter, Jason Quintana 2004-12-21
6698858 System and method for decreasing print banding with time delay synchronization of ejected ink Ronald A. Askeland, James A. Feinn, Jason R. Arbeiter, Jason Quintana 2004-03-02