Inventor
LANGFORD JEFFREY D
US20 patents
⚠️ This page may combine multiple inventors who share the name “LANGFORD JEFFREY D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HEWLETT PACKARD DEVELOPMENT CO
13 patentsUS7331664B2Feb 19, 2008
Ink delivery system and a method for replacing ink
HEWLETT PACKARD DEVELOPMENT CO18 citations91
US7296881B2Nov 20, 2007
Printhead de-priming
HEWLETT PACKARD DEVELOPMENT CO17 citations91
US7556367B2Jul 7, 2009
Ink delivery system and a method for replacing ink
HEWLETT PACKARD DEVELOPMENT CO12 citations83
US7416293B2Aug 26, 2008
Ink recirculation system
HEWLETT PACKARD DEVELOPMENT CO9 citations83
US7628475B2Dec 8, 2009
Printhead evacuation mechanism and method
HEWLETT PACKARD DEVELOPMENT CO8 citations82
US7543908B2Jun 9, 2009
Clearing silicate kogation
HEWLETT PACKARD DEVELOPMENT CO10 citations79
US7510274B2Mar 31, 2009
Ink delivery system and methods for improved printing
HEWLETT PACKARD DEVELOPMENT CO7 citations73
US8002395B2Aug 23, 2011
Ink recirculation system
HEWLETT PACKARD DEVELOPMENT CO4 citations62
US7997698B2Aug 16, 2011
Ink delivery system and methods for improved printing
HEWLETT PACKARD DEVELOPMENT CO2 citations62
US7922314B2Apr 12, 2011
Printing mechanism and method of ink formulation
HEWLETT PACKARD DEVELOPMENT CO2 citations61
US12246540B2Mar 11, 2025
Profile governing servicing maintenance of fluidic printhead nozzles
HEWLETT PACKARD DEVELOPMENT CO0 citations56
US7237879B2Jul 3, 2007
Method and apparatus for reducing nozzle failure in stored inkjet printheads
HEWLETT PACKARD DEVELOPMENT CO0 citations51
US6655794B2Dec 2, 2003
Methods and apparatus for curing a thermal sealing material using a heater trace
HEWLETT PACKARD DEVELOPMENT CO0 citations43
HEWLETT PACKARD CO
4 patentsUS6273560B1Aug 14, 2001
Print cartridge coupling and reservoir assembly for use in an inkjet printing system with an off-axis ink supply
HEWLETT PACKARD CO30 citations92
US6145967ANov 14, 2000
Method and apparatus for configuring a fluid interconnect for an ink-jet printhead
HEWLETT PACKARD CO29 citations92
USD424103SMay 2, 2000
Inkjet printhead
HEWLETT PACKARD CO18 citations92
US6364458B2Apr 2, 2002
Pivoted printhead handle with recessed rest position
HEWLETT PACKARD CO20 citations89