Inventor

WARD JEFFERSON P

US122 patents

⚠️ This page may combine multiple inventors who share the name “WARD JEFFERSON P”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HEWLETT PACKARD DEVELOPMENT CO

23 patents

US10875318B1Dec 29, 2020

Logic circuitry

HEWLETT PACKARD DEVELOPMENT CO31 citations97

US6698866B2Mar 2, 2004

Fluid ejection device using multiple grip pattern data

HEWLETT PACKARD DEVELOPMENT CO58 citations96

US11034157B2Jun 15, 2021

Logic circuitry

HEWLETT PACKARD DEVELOPMENT CO29 citations94

US10894423B2Jan 19, 2021

Logic circuitry

HEWLETT PACKARD DEVELOPMENT CO29 citations94

US9893893B2Feb 13, 2018

Replaceable item authentication

HEWLETT PACKARD DEVELOPMENT CO25 citations94

US10214019B2Feb 26, 2019

Flexible substrate with integrated circuit

HEWLETT PACKARD DEVELOPMENT CO32 citations93

US6644782B1Nov 11, 2003

Printing system and printing under firing data resolution method for printing system

HEWLETT PACKARD DEVELOPMENT CO22 citations91

US11020976B2Jun 1, 2021

Supply authentication via timing challenge response

HEWLETT PACKARD DEVELOPMENT CO5 citations84

US10940693B1Mar 9, 2021

Logic circuitry

HEWLETT PACKARD DEVELOPMENT CO3 citations84

US10220631B2Mar 5, 2019

Transform map at printer cartridge

HEWLETT PACKARD DEVELOPMENT CO5 citations84

US7399047B2Jul 15, 2008

Consumable cartridge with theft deterrence features

HEWLETT PACKARD DEVELOPMENT CO11 citations84

US7339686B1Mar 4, 2008

System and method for intelligent print quality selection

HEWLETT PACKARD DEVELOPMENT CO11 citations84

US7034968B2Apr 25, 2006

Color calibration chart

HEWLETT PACKARD DEVELOPMENT CO15 citations83

US7611222B2Nov 3, 2009

Nozzle shield assembly

HEWLETT PACKARD DEVELOPMENT CO11 citations79

US6908171B2Jun 21, 2005

Print-quality control method and system

HEWLETT PACKARD DEVELOPMENT CO7 citations74

US11479046B2Oct 25, 2022

Logic circuitry for sensor data communications

HEWLETT PACKARD DEVELOPMENT CO1 citations73

US11250146B2Feb 15, 2022

Logic circuitry

HEWLETT PACKARD DEVELOPMENT CO3 citations73

US11048791B2Jun 29, 2021

Digitally signed data

HEWLETT PACKARD DEVELOPMENT CO3 citations73

US10956556B2Mar 23, 2021

Protecting data in memory of a consumable product

HEWLETT PACKARD DEVELOPMENT CO1 citations73

US10372898B2Aug 6, 2019

Protecting data in memory of a consumable product

HEWLETT PACKARD DEVELOPMENT CO2 citations73

US10277399B2Apr 30, 2019

Replaceable item authentication

HEWLETT PACKARD DEVELOPMENT CO2 citations73

US10237451B2Mar 19, 2019

Printer cartridges and memory devices containing compressed multi-dimensional color tables

HEWLETT PACKARD DEVELOPMENT CO4 citations73

US10205596B2Feb 12, 2019

Authenticating a consumable product based on a remaining life value

HEWLETT PACKARD DEVELOPMENT CO4 citations73

HEWLETT PACKARD CO

13 patents

US6132028AOct 17, 2000

Contoured orifice plate of thermal ink jet print head

HEWLETT PACKARD CO181 citations99

US5659342AAug 19, 1997

On-page inkjet printhead spitting system

HEWLETT PACKARD CO136 citations98

US6149327ANov 21, 2000

Method and apparatus for determining and controlling inkjet printing drying time

HEWLETT PACKARD CO64 citations96

US5146243ASep 8, 1992

Diaphragm cap system for ink-jet printers

HEWLETT PACKARD CO97 citations96

US5027134AJun 25, 1991

Non-clogging cap and service station for ink-jet printheads

HEWLETT PACKARD CO111 citations96

US5151715ASep 29, 1992

Printhead wiper for ink-jet printers

HEWLETT PACKARD CO72 citations95

US6328411B1Dec 11, 2001

Ferro-fluidic inkjet printhead sealing and spitting system

HEWLETT PACKARD CO45 citations94

US6450634B2Sep 17, 2002

Marking media using notches

HEWLETT PACKARD CO17 citations93

US6367919B1Apr 9, 2002

Ink container with ink level gauge

HEWLETT PACKARD CO22 citations93

US6425650B1Jul 30, 2002

Educatable media determination system for inkjet printing

HEWLETT PACKARD CO49 citations92

US6293646B1Sep 25, 2001

Ink-jet look-ahead servicing

HEWLETT PACKARD CO27 citations87

US6623095B1Sep 23, 2003

Print-quality control method and system

HEWLETT PACKARD CO11 citations74

US6378975B1Apr 30, 2002

Drop detection using a movable strip

HEWLETT PACKARD CO9 citations74

HEWLETT PACKARD DEVELOPMENT CO LP

10 patents

US9852282B2Dec 26, 2017

Protecting data in memory of a consumable product

HEWLETT PACKARD DEVELOPMENT CO LP35 citations98

US9561662B2Feb 7, 2017

Supply authentication via timing challenge response

HEWLETT PACKARD DEVELOPMENT CO LP65 citations98

US9819835B2Nov 14, 2017

Transform map at printer cartridge

HEWLETT PACKARD DEVELOPMENT CO LP10 citations92

US9796186B1Oct 24, 2017

Transform map at printer cartridge

HEWLETT PACKARD DEVELOPMENT CO LP10 citations92

US9770915B1Sep 26, 2017

Replaceable item authentication

HEWLETT PACKARD DEVELOPMENT CO LP19 citations92

US9621764B2Apr 11, 2017

Printer cartridge and memory device containing a compressed color table

HEWLETT PACKARD DEVELOPMENT CO LP13 citations92

US9800765B2Oct 24, 2017

Printer cartridges and memory devices containing compressed multi-dimensional color tables

HEWLETT PACKARD DEVELOPMENT CO LP9 citations84

US9882899B2Jan 30, 2018

Remotely authenticating a device

HEWLETT PACKARD DEVELOPMENT CO LP3 citations73

US9878555B2Jan 30, 2018

Supply authentication via timing challenge response

HEWLETT PACKARD DEVELOPMENT CO LP3 citations73

US9781305B1Oct 3, 2017

Replaceable item authentication

HEWLETT PACKARD DEVELOPMENT CO LP5 citations73

ANDERSON DARYL E

1 patent

US9511596B2Dec 6, 2016

Replaceable printing component with factory identity code

ANDERSON DARYL E33 citations94

HEWLETT-PACKARD DEV COMPANY

1 patent

US9599945B2Mar 21, 2017

Methods and systems for determining authenticity of a consumable product

HEWLETT-PACKARD DEV COMPANY5 citations81

HELTERLINE BRIAN L

1 patent

US8205976B2Jun 26, 2012

Partition map

HELTERLINE BRIAN L6 citations81

SIMPSON SHELL S

1 patent

US9327510B2May 3, 2016

Verification record for a replaceable supply

SIMPSON SHELL S3 citations72

Showing the top 50 of 122 patents by PatentIndex Score.