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
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