Inventor
WALLER DAVID J
US22 patents
⚠️ This page may combine multiple inventors who share the name “WALLER DAVID J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HEWLETT PACKARD DEVELOPMENT CO
12 patentsUS7048353B2May 23, 2006
Printhead maintenance system
HEWLETT PACKARD DEVELOPMENT CO20 citations92
US6905619B2Jun 14, 2005
Method of forming pillars in a fully integrated thermal inkjet printhead
HEWLETT PACKARD DEVELOPMENT CO13 citations92
US6660175B2Dec 9, 2003
Method of forming pillars in a fully integrated thermal inkjet printhead
HEWLETT PACKARD DEVELOPMENT CO24 citations92
US6540323B1Apr 1, 2003
Snout-encompassing capping system for inkjet printheads
HEWLETT PACKARD DEVELOPMENT CO28 citations92
US6846060B2Jan 25, 2005
Printhead servicing mechanism and method
HEWLETT PACKARD DEVELOPMENT CO12 citations83
US6641744B1Nov 4, 2003
Method of forming pillars in a fully integrated thermal inkjet printhead
HEWLETT PACKARD DEVELOPMENT CO12 citations82
US7104636B2Sep 12, 2006
Pen maintenance system and method for operating same
HEWLETT PACKARD DEVELOPMENT CO10 citations73
US6722752B2Apr 20, 2004
Pen maintenance system and method for operating same
HEWLETT PACKARD DEVELOPMENT CO9 citations73
US6783689B2Aug 31, 2004
Method of forming pillars in a fully integrated thermal inkjet printhead
HEWLETT PACKARD DEVELOPMENT CO2 citations63
US6843550B2Jan 18, 2005
Printhead servicing mechanism and method
HEWLETT PACKARD DEVELOPMENT CO4 citations58
US7204933B2Apr 17, 2007
Method of forming pillars in a fully integrated thermal inkjet printhead
HEWLETT PACKARD DEVELOPMENT CO0 citations52
US7753471B2Jul 13, 2010
Printing mechanism and method
HEWLETT PACKARD DEVELOPMENT CO4 citations51
HEWLETT PACKARD CO
10 patentsUS6003977ADec 21, 1999
Bubble valving for ink-jet printheads
HEWLETT PACKARD CO228 citations99
US6428156B1Aug 6, 2002
Ink delivery system and method for controlling fluid pressure therein
HEWLETT PACKARD CO150 citations98
US6250738B1Jun 26, 2001
Inkjet printing apparatus with ink manifold
HEWLETT PACKARD CO417 citations98
US6309054B1Oct 30, 2001
Pillars in a printhead
HEWLETT PACKARD CO49 citations96
US6099108AAug 8, 2000
Method and apparatus for improved ink-drop distribution in ink-jet printing
HEWLETT PACKARD CO50 citations96
US6527369B1Mar 4, 2003
Asymmetric printhead orifice
HEWLETT PACKARD CO52 citations94
US6354694B1Mar 12, 2002
Method and apparatus for improved ink-drop distribution in ink-jet printing
HEWLETT PACKARD CO19 citations92
US6155670ADec 5, 2000
Method and apparatus for improved ink-drop distribution in inkjet printing
HEWLETT PACKARD CO43 citations92
US5988786ANov 23, 1999
Articulated stress relief of an orifice membrane
HEWLETT PACKARD CO24 citations92
US5969736AOct 19, 1999
Passive pressure regulator for setting the pressure of a liquid to a predetermined pressure differential below a reference pressure
HEWLETT PACKARD CO50 citations90