Inventor · disambiguated record

David D. Helfrick

Also filed as: HELFRICK DAVID D

3 granted patents·25 citations·filing 2003–2003

67Inventor score

Technology areasB41J

Files withHEWLETT PACKARD DEVELOPMENT CO3

Top patents by PatentIndex Score

3 records

0170US6832823B1Disabling ink ejection elements to decrease dot placement artifacts in an inkjet printheadHEWLETT PACKARD DEVELOPMENT CO·Filed 2003·Granted Dec 21, 2004·13 cites·32 claims
0268US6698858B1System and method for decreasing print banding with time delay synchronization of ejected inkHEWLETT PACKARD DEVELOPMENT CO·Filed 2003·Granted Mar 2, 2004·11 cites·30 claims
0340US6935714B2Variable mapping of nozzle rows to decrease dot placement artifacts of an inkjet printheadHEWLETT PACKARD DEVELOPMENT CO·Filed 2003·Granted Aug 30, 2005·1 cites·43 claims

Join the waitlist — get patent alerts

Get an alert when David D. Helfrick files or is granted a new patent.

We store only your email — no account needed. See our privacy policy.

Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →