P

Inventor

HUNT DAVID S

US34 patents
⚠️ This page may combine multiple inventors who share the name “HUNT DAVID S”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HEWLETT PACKARD CO

19 patents
US6000791ADec 14, 1999

Printer having a removable print cartridge with handle incorporating an ink inlet value

HEWLETT PACKARD CO91 citations97
US5751320AMay 12, 1998

Ink recharger for inkjet print cartridge having sliding valve connectable to print cartridge

HEWLETT PACKARD CO133 citations97
US5903292AMay 11, 1999

Ink refill techniques for an inkjet print cartridge which leave correct back pressure

HEWLETT PACKARD CO77 citations96
US5675367AOct 7, 1997

Inkjet print cartridge having handle which incorporates an ink fill port

HEWLETT PACKARD CO93 citations96
US5359353AOct 25, 1994

Spring-bag printer ink cartridge with volume indicator

HEWLETT PACKARD CO83 citations95
US5874976AFeb 23, 1999

Inkjet cartridge fill port adapter

HEWLETT PACKARD CO63 citations94
US5621445AApr 15, 1997

Apparatus for refilling ink cartridges

HEWLETT PACKARD CO123 citations94
US5440333AAug 8, 1995

Collapsible ink reservoir and ink-jet cartridge with protective bonding layer for the pressure regulator

HEWLETT PACKARD CO59 citations93
US5966156AOct 12, 1999

Refilling technique for inkjet print cartridge having two ink inlet ports for initial filling and recharging

HEWLETT PACKARD CO34 citations92
US5963238AOct 5, 1999

Intermittent refilling of print cartridge installed in an inkjet printer

HEWLETT PACKARD CO26 citations92
US5852458ADec 22, 1998

Inkjet print cartridge having a first inlet port for initial filling and a second inlet port for ink replenishment without removing the print cartridge from the printer

HEWLETT PACKARD CO25 citations92
US5793387AAug 11, 1998

Method and apparatus for ink-jet ink level detection

HEWLETT PACKARD CO25 citations92
US5777648AJul 7, 1998

Inkjet print cartridge having an ink fill port for initial filling and a recharge port with recloseable seal for recharging the print cartridge with ink

HEWLETT PACKARD CO28 citations92
US5748216AMay 5, 1998

Inkjet print cartridge having valve connectable to an external ink reservoir for recharging the print cartridge

HEWLETT PACKARD CO32 citations92
US5434603AJul 18, 1995

Ink cartridge with passageway for ink level indicator

HEWLETT PACKARD CO27 citations92
US6224192B1May 1, 2001

Inkjet printing systems using a modular print cartridge assembly

HEWLETT PACKARD CO51 citations90
US6065826AMay 23, 2000

Modular print cartridge receptacle for use in inkjet printing systems

HEWLETT PACKARD CO44 citations90
US5929883AJul 27, 1999

Printing system with single on/off control valve for periodic ink replenishment of inkjet printhead

HEWLETT PACKARD CO34 citations90
US5596358AJan 21, 1997

Method and apparatus for refilling a print cartridge having a reservoir pressure of less than ambient pressure

HEWLETT PACKARD CO7 citations69

PROCTER & GAMBLE

10 patents

ST MICROELECTRONICS INC

3 patents

ST MICROELECTRONICS INT NV

1 patent

HEWLETT PACKARD DEVELOPMENT CO

1 patent