Inventor
STEINFIELD STEVEN W
US48 patents
⚠️ This page may combine multiple inventors who share the name “STEINFIELD STEVEN W”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HEWLETT PACKARD CO
27 patentsUS5278584AJan 11, 1994
Ink delivery system for an inkjet printhead
HEWLETT PACKARD CO381 citations99
US6244696B1Jun 12, 2001
Inkjet print cartridge design for decreasing ink shorts by using an elevated substrate support surface to increase adhesive sealing of the printhead from ink penetration
HEWLETT PACKARD CO87 citations98
US5946012AAug 31, 1999
Reliable high performance drop generator for an inkjet printhead
HEWLETT PACKARD CO131 citations98
US5874974AFeb 23, 1999
Reliable high performance drop generator for an inkjet printhead
HEWLETT PACKARD CO91 citations97
US6508552B1Jan 21, 2003
Printer having precision ink drying capability and method of assembling the printer
HEWLETT PACKARD CO65 citations96
US6332677B1Dec 25, 2001
Stable substrate structure for a wide swath nozzle array in a high resolution inkjet printer
HEWLETT PACKARD CO75 citations96
US5984464ANov 16, 1999
Stable substrate structure for a wide swath nozzle array in a high resolution inkjet printer
HEWLETT PACKARD CO55 citations96
US5648806AJul 15, 1997
Stable substrate structure for a wide swath nozzle array in a high resolution inkjet printer
HEWLETT PACKARD CO54 citations96
US5648804AJul 15, 1997
Compact inkjet substrate with centrally located circuitry and edge feed ink channels
HEWLETT PACKARD CO61 citations96
US5638101AJun 10, 1997
High density nozzle array for inkjet printhead
HEWLETT PACKARD CO69 citations96
US5604519AFeb 18, 1997
Inkjet printhead architecture for high frequency operation
HEWLETT PACKARD CO83 citations96
US5594481AJan 14, 1997
Ink channel structure for inkjet printhead
HEWLETT PACKARD CO96 citations96
US5420627AMay 30, 1995
Inkjet printhead
HEWLETT PACKARD CO65 citations96
US5648805AJul 15, 1997
Inkjet printhead architecture for high speed and high resolution printing
HEWLETT PACKARD CO77 citations95
US5635966AJun 3, 1997
Edge feed ink delivery thermal inkjet printhead structure and method of fabrication
HEWLETT PACKARD CO91 citations94
US6457821B1Oct 1, 2002
Filter carrier for protecting a filter from being blocked by air bubbles in an inkjet printhead
HEWLETT PACKARD CO29 citations93
US6179414B1Jan 30, 2001
Ink delivery system for an inkjet printhead
HEWLETT PACKARD CO34 citations93
US5953029ASep 14, 1999
Ink delivery system for an inkjet printhead
HEWLETT PACKARD CO18 citations93
US5450113ASep 12, 1995
Inkjet printhead with improved seal arrangement
HEWLETT PACKARD CO44 citations93
US6334661B1Jan 1, 2002
System and method for inducing tensioning of a flexible nozzle member of an inkjet printer with an adhesive
HEWLETT PACKARD CO22 citations92
US5619236AApr 8, 1997
Self-cooling printhead structure for inkjet printer with high density high frequency firing chambers
HEWLETT PACKARD CO23 citations92
US5568171AOct 22, 1996
Compact inkjet substrate with a minimal number of circuit interconnects located at the end thereof
HEWLETT PACKARD CO35 citations92
US5563642AOct 8, 1996
Inkjet printhead architecture for high speed ink firing chamber refill
HEWLETT PACKARD CO28 citations92
US5625396AApr 29, 1997
Ink delivery method for an inkjet print cartridge
HEWLETT PACKARD CO12 citations74
US6186622B1Feb 13, 2001
Low expansion snout insert for inkjet print cartridge
HEWLETT PACKARD CO13 citations73
US6314660B1Nov 13, 2001
Cascaded tensioning tangential drive for THA handling
HEWLETT PACKARD CO4 citations60
US6467878B1Oct 22, 2002
System and method for locally controlling the thickness of a flexible nozzle member
HEWLETT PACKARD CO3 citations55
HEWLETT PACKARD DEVELOPMENT CO
18 patentsUS6733139B2May 11, 2004
Projector with narrow-spectrum light source to complement broad-spectrum light source
HEWLETT PACKARD DEVELOPMENT CO51 citations96
US6962715B2Nov 8, 2005
Method and dosage form for dispensing a bioactive substance
HEWLETT PACKARD DEVELOPMENT CO20 citations92
US6932502B2Aug 23, 2005
Mixing apparatus
HEWLETT PACKARD DEVELOPMENT CO22 citations92
US6702894B2Mar 9, 2004
Fluid ejection cartridge and system for dispensing a bioactive substance
HEWLETT PACKARD DEVELOPMENT CO48 citations92
US6692100B2Feb 17, 2004
Cleaning apparatus and method of assembly therefor for cleaning an inkjet print head
HEWLETT PACKARD DEVELOPMENT CO54 citations88
US7275534B2Oct 2, 2007
Medicament ejector with ejection port servicing
HEWLETT PACKARD DEVELOPMENT CO11 citations84
US6834930B2Dec 28, 2004
Imaging device including an optical sensor
HEWLETT PACKARD DEVELOPMENT CO20 citations84
US8002382B2Aug 23, 2011
Print head wiping
HEWLETT PACKARD DEVELOPMENT CO10 citations78
US6799882B2Oct 5, 2004
Mixing apparatus for injecting fluid into a gas stream
HEWLETT PACKARD DEVELOPMENT CO10 citations74
US6575550B1Jun 10, 2003
Determining performance of a fluid ejection device
HEWLETT PACKARD DEVELOPMENT CO11 citations74
US6905217B2Jun 14, 2005
Projector with narrow-spectrum light source to complement broad-spectrum light source
HEWLETT PACKARD DEVELOPMENT CO6 citations73
US7232226B2Jun 19, 2007
Color-generating device and display system
HEWLETT PACKARD DEVELOPMENT CO2 citations62
US6920000B2Jul 19, 2005
Filter for a display system
HEWLETT PACKARD DEVELOPMENT CO3 citations62
US6688718B1Feb 10, 2004
Heat transfer device for an inkjet printer
HEWLETT PACKARD DEVELOPMENT CO4 citations62
US7437104B2Oct 14, 2008
Developer cleaning
HEWLETT PACKARD DEVELOPMENT CO1 citations52
US7038867B2May 2, 2006
Filter for display system
HEWLETT PACKARD DEVELOPMENT CO1 citations52
US6921175B2Jul 26, 2005
Color-generating device and display system
HEWLETT PACKARD DEVELOPMENT CO1 citations52
US7229152B2Jun 12, 2007
Fluid ejection device with insulating feature
HEWLETT PACKARD DEVELOPMENT CO1 citations47