DH

David D. Helfrick

HP HP: 2 patents #393 of 2,400Top 20%
📍 San Diego, CA: #203 of 1,686 inventorsTop 15%
🗺 California: #3,906 of 28,370 inventorsTop 15%
Overall (2004): #68,601 of 270,089Top 30%
2
Patents 2004

Issued Patents 2004

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
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