Inventor · disambiguated record
Bruce Cowger
Also filed as: COWGER BRUCE
60 granted patents·1 pending application·4,309 citations·filing 1987–2018
99Inventor score
Top patents by PatentIndex Score
61 records- 0199US5788388AInk jet cartridge with ink level detectionHEWLETT PACKARD CO·Filed 1997·Granted Aug 4, 1998·443 cites·26 claims
- 0298US6130695AInk delivery system adapterHEWLETT PACKARD CO·Filed 1998·Granted Oct 10, 2000·211 cites·8 claims
- 0398US5860363AInk jet cartridge with separately replaceable ink reservoirHEWLETT PACKARD CO·Filed 1997·Granted Jan 19, 1999·209 cites·18 claims
- 0498US5565900AUnit print head assembly for ink-jet printingHEWLETT PACKARD CO·Filed 1994·Granted Oct 15, 1996·387 cites·10 claims
- 0598US4794409AInk jet pen having improved ink storage and distribution capabilitiesHEWLETT PACKARD CO·Filed 1987·Granted Dec 27, 1988·223 cites·9 claims
- 0697US5956057AInk container having electronic and mechanical features enabling plug compatibility between multiple supply sizesHEWLETT PACKARD CO·Filed 1997·Granted Sep 21, 1999·110 cites·29 claims
- 0796US6183077B1Method and apparatus for keying ink supply containersHEWLETT PACKARD CO·Filed 1998·Granted Feb 6, 2001·114 cites·26 claims
- 0896US5936650AInk delivery system for ink-jet pensHEWLETT PACKARD CO·Filed 1997·Granted Aug 10, 1999·162 cites·28 claims
- 0995US6322207B1Replaceable pump module for receiving replaceable ink supplies to provide ink to an ink jet printing systemHEWLETT PACKARD CO·Filed 1999·Granted Nov 27, 2001·94 cites·6 claims
- 1095US6102508AMethod and apparatus for selecting printer consumablesHEWLETT PACKARD CO·Filed 1996·Granted Aug 15, 2000·109 cites·18 claims
- 1195US5409134APressure-sensitive accumulator for ink-jet pensHEWLETT PACKARD CORP·Filed 1991·Granted Apr 25, 1995·194 cites·40 claims
- 1295US4931811AThermal ink jet pen having a feedtube with improved sizing and operational with a minimum of deprimingHEWLETT PACKARD CO·Filed 1989·Granted Jun 5, 1990·102 cites·2 claims
- 1395US4920362AVolumetrically efficient ink jet pen capable of extreme altitude and temperature excursionsHEWLETT PACKARD CO·Filed 1988·Granted Apr 24, 1990·78 cites·13 claims
- 1495US4791438ABalanced capillary ink jet pen for ink jet printing systemsHEWLETT PACKARD CO·Filed 1987·Granted Dec 13, 1988·103 cites·16 claims
- 1594US5646666ABack pressure control in ink-jet printingHEWLETT PACKARD CO·Filed 1994·Granted Jul 8, 1997·107 cites·10 claims
- 1694US5583545AInk level detection in a pressure regulated penHEWLETT PACKARD CO·Filed 1994·Granted Dec 10, 1996·97 cites·22 claims
- 1793US7114801B2Method and apparatus for providing ink to an ink jet printing systemHEWLETT PACKARD DEVELOPMENT CO·Filed 2003·Granted Oct 3, 2006·45 cites·6 claims
- 1893US6364472B1Method and apparatus for keying ink supply containersHEWLETT PACKARD CO·Filed 2001·Granted Apr 2, 2002·46 cites·20 claims
- 1993US5856840AMethod of manufacturing a replaceable ink supply for an ink-jet printerHEWLETT PACKARD CO·Filed 1995·Granted Jan 5, 1999·63 cites·28 claims
- 2092US5900896AInk cartridge adaptersHEWLETT PACKARD CO·Filed 1995·Granted May 4, 1999·82 cites·17 claims
- 2191US6764169B2Method and apparatus for providing ink to an ink jet printing systemHEWLETT PACKARD DEVELOPMENT CO·Filed 2001·Granted Jul 20, 2004·35 cites·10 claims
- 2291US6142617AInk container configured for use with compact supply stationHEWLETT PACKARD CO·Filed 1997·Granted Nov 7, 2000·67 cites·15 claims
- 2391US5751300AInk delivery system for a printerHEWLETT PACKARD CO·Filed 1994·Granted May 12, 1998·77 cites·13 claims
- 2491US5526030APressure control apparatus for an ink penHEWLETT PACKARD CO·Filed 1992·Granted Jun 11, 1996·85 cites·16 claims
- 2591US5153612AInk delivery system for an ink-jet penHEWLETT PACKARD CO·Filed 1991·Granted Oct 6, 1992·77 cites·11 claims
- 2691US5010354AInk jet pen with improved volumetric efficiencyHEWLETT PACKARD CO·Filed 1989·Granted Apr 23, 1991·60 cites·16 claims
- 2789US6386692B1Ink container configured for use with compact supply stationHEWLETT PACKARD CO·Filed 2000·Granted May 14, 2002·31 cites·14 claims
- 2889US5825387AInk supply for an ink-jet printerHEWLETT PACKARD CO·Filed 1995·Granted Oct 20, 1998·49 cites·25 claims
- 2989US5537134ARefill method for ink-jet print cartridgeHEWLETT PACKARD CO·Filed 1993·Granted Jul 16, 1996·69 cites·9 claims
- 3088US10654280B2Printhead assemblyHEWLETT PACKARD DEVELOPMENT CO·Filed 2015·Granted May 19, 2020·3 cites·20 claims
- 3188US6481817B1Method and apparatus for ejecting inkHEWLETT PACKARD CO·Filed 2000·Granted Nov 19, 2002·35 cites·29 claims
- 3288US5363130AMethod of valving and orientation sensitive valve including a liquid for controlling flow of gas into a containerHEWLETT PACKARD CO·Filed 1991·Granted Nov 8, 1994·61 cites·18 claims
- 3387US6343857B1Ink circulation in ink-jet pensHEWLETT PACKARD CO·Filed 1994·Granted Feb 5, 2002·56 cites·11 claims
- 3483US5505339APressure-sensitive accumulator for ink-jet pensHEWLETT PACKARD CO·Filed 1995·Granted Apr 9, 1996·47 cites·3 claims
- 3582US5103243AVolumetrically efficient ink jet pen capable of extreme altitude and temperature excursionsHEWLETT PACKARD CO·Filed 1990·Granted Apr 7, 1992·42 cites·7 claims
- 3681US5917523ARefill method for ink-jet print cartridgeHEWLETT PACKARD CO·Filed 1996·Granted Jun 29, 1999·47 cites·6 claims
- 3781US5691755ACollapsible ink cartridgeHEWLETT PACKARD CO·Filed 1994·Granted Nov 25, 1997·41 cites·18 claims
- 3881US5047790AControlled capillary ink containment for ink-jet pensHEWLETT PACKARD CO·Filed 1990·Granted Sep 10, 1991·42 cites·3 claims
- 3980US6305795B2Ink container having electronic and mechanical features enabling plug compatibility between multiple supply sizesFiled 1999·Granted Oct 23, 2001·35 cites·28 claims
- 4079US5852946AMethod and apparatus for detecting fluid levelHEWLETT PACKARD CO·Filed 1996·Granted Dec 29, 1998·44 cites·23 claims
- 4177US6550899B1Ink supply for an ink-jet printerHEWLETT PACKARD CO·Filed 1999·Granted Apr 22, 2003·26 cites·8 claims
- 4274US6305786B1Unit print head assembly for an ink-jet printerHEWLETT PACKARD CO·Filed 1994·Granted Oct 23, 2001·33 cites·20 claims
- 4373US6402279B1Inkjet printhead and method for the sameHEWLETT PACKARD CO·Filed 2000·Granted Jun 11, 2002·15 cites·21 claims
- 4473US5572245AProtective cover apparatus for an ink-jet penHEWLETT PACKARD CO·Filed 1994·Granted Nov 5, 1996·28 cites·19 claims
- 4572US5574489AInk cartridge system for ink-jet printerHEWLETT PACKARD CO·Filed 1994·Granted Nov 12, 1996·36 cites·20 claims
- 4671US6698857B2Method and apparatus for transferring information to a printheadHEWLETT PACKARD DEVELOPMENT CO·Filed 2003·Granted Mar 2, 2004·11 cites·20 claims
- 4770US5912687AInk supply system for a printerHEWLETT PACKARD CO·Filed 1995·Granted Jun 15, 1999·29 cites·21 claims
- 4869US5602577AHumidifier apparatus for fluid-containing tubes and an improved ink-jet printer utilizing the apparatusHEWLETT PACKARD CO·Filed 1994·Granted Feb 11, 1997·23 cites·14 claims
- 4968US5742308AInk jet printer cartridge refilling method and apparatusHEWLETT PACKARD CO·Filed 1994·Granted Apr 21, 1998·22 cites·8 claims
- 5068US5574484ALevel detection for ink cartridges of ink-jet printersHEWLETT PACKARD CO·Filed 1994·Granted Nov 12, 1996·21 cites·13 claims
Showing the top 50 of 61 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →