Inventor · disambiguated record
Brian J. Keefe
Also filed as: KEEFE BRIAN · KEEFE BRIAN J · KEEFE BRIAN JOHN
55 granted patents·10 pending applications·2,987 citations·filing 1990–2022
99Inventor score
Top patents by PatentIndex Score
65 records- 0199US6341845B1Electrical connection for wide-array inkjet printhead assembly with hybrid carrier for printhead diesHEWLETT PACKARD CO·Filed 2000·Granted Jan 29, 2002·248 cites·42 claims
- 0299US5278584AInk delivery system for an inkjet printheadHEWLETT PACKARD CO·Filed 1992·Granted Jan 11, 1994·381 cites·12 claims
- 0398US6557976B2Electrical circuit for wide-array inkjet printhead assemblyHEWLETT PACKARD DEVELOPMENT CO·Filed 2001·Granted May 6, 2003·317 cites·14 claims
- 0496US9724926B2Dual regulator print moduleKEEFE BRIAN J·Filed 2010·Granted Aug 8, 2017·38 cites·20 claims
- 0596US5946012AReliable high performance drop generator for an inkjet printheadHEWLETT PACKARD CO·Filed 1998·Granted Aug 31, 1999·131 cites·44 claims
- 0694US6543880B1Inkjet printhead assembly having planarized mounting layer for printhead diesHEWLETT PACKARD CO·Filed 2000·Granted Apr 8, 2003·126 cites·52 claims
- 0794US6464333B1Inkjet printhead assembly with hybrid carrier for printhead diesHEWLETT PACKARD CO·Filed 2000·Granted Oct 15, 2002·56 cites·40 claims
- 0894US5880748AInk delivery system for an inkjet pen having an automatic pressure regulation systemHEWLETT PACKARD CO·Filed 1996·Granted Mar 9, 1999·99 cites·29 claims
- 0993US6332677B1Stable substrate structure for a wide swath nozzle array in a high resolution inkjet printerHEWLETT PACKARD CO·Filed 1999·Granted Dec 25, 2001·75 cites·17 claims
- 1093US5874974AReliable high performance drop generator for an inkjet printheadHEWLETT PACKARD CO·Filed 1996·Granted Feb 23, 1999·91 cites·42 claims
- 1193US5594481AInk channel structure for inkjet printheadHEWLETT PACKARD CO·Filed 1994·Granted Jan 14, 1997·96 cites·19 claims
- 1291US6997540B2Substrate for fluid ejection devicesHEWLETT PACKARD DEVELOPMENT CO·Filed 2003·Granted Feb 14, 2006·36 cites·32 claims
- 1391US6431683B1Hybrid carrier for wide-array inkjet printhead assemblyHEWLETT PACKARD CO·Filed 2001·Granted Aug 13, 2002·43 cites·32 claims
- 1491US5635966AEdge feed ink delivery thermal inkjet printhead structure and method of fabricationHEWLETT PACKARD CO·Filed 1994·Granted Jun 3, 1997·91 cites·10 claims
- 1591US5604519AInkjet printhead architecture for high frequency operationHEWLETT PACKARD CO·Filed 1994·Granted Feb 18, 1997·83 cites·22 claims
- 1690US5648805AInkjet printhead architecture for high speed and high resolution printingHEWLETT PACKARD CO·Filed 1994·Granted Jul 15, 1997·77 cites·20 claims
- 1790US5648806AStable substrate structure for a wide swath nozzle array in a high resolution inkjet printerHEWLETT PACKARD CO·Filed 1994·Granted Jul 15, 1997·54 cites·18 claims
- 1889US5984464AStable substrate structure for a wide swath nozzle array in a high resolution inkjet printerHEWLETT PACKARD CO·Filed 1997·Granted Nov 16, 1999·55 cites·20 claims
- 1989US5638101AHigh density nozzle array for inkjet printheadHEWLETT PACKARD CO·Filed 1994·Granted Jun 10, 1997·69 cites·16 claims
- 2088US5648804ACompact inkjet substrate with centrally located circuitry and edge feed ink channelsHEWLETT PACKARD CO·Filed 1994·Granted Jul 15, 1997·61 cites·44 claims
- 2188US5420627AInkjet printheadHEWLETT PACKARD CO·Filed 1992·Granted May 30, 1995·65 cites·15 claims
- 2286US10654275B2Dual regulator print moduleHEWLETT PACKARD DEVELOPMENT CO·Filed 2018·Granted May 19, 2020·1 cites·16 claims
- 2385US10179455B2Dual regulator print moduleHEWLETT PACKARD DEVELOPMENT CO·Filed 2017·Granted Jan 15, 2019·1 cites·19 claims
- 2485US6705705B2Substrate for fluid ejection devicesHEWLETT PACKARD DEVELOPMENT CO·Filed 2002·Granted Mar 16, 2004·23 cites·48 claims
- 2584US5748209AThermal ink jet tab circuit having a plurality of trace groups wherein adjacent traces in each group are staggeredHEWLETT PACKARD CO·Filed 1994·Granted May 5, 1998·55 cites·4 claims
- 2682US6409307B1Coplanar mounting of printhead dies for wide-array inkjet printhead assemblyHEWLETT PACKARD CO·Filed 2001·Granted Jun 25, 2002·23 cites·35 claims
- 2782US5450113AInkjet printhead with improved seal arrangementHEWLETT PACKARD CO·Filed 1992·Granted Sep 12, 1995·44 cites·12 claims
- 2881US6003986ABubble tolerant manifold design for inkjet cartridgeHEWLETT PACKARD CO·Filed 1995·Granted Dec 21, 1999·43 cites·8 claims
- 2979US6520624B1Substrate with fluid passage supportsHEWLETT PACKARD CO·Filed 2002·Granted Feb 18, 2003·24 cites·15 claims
- 3079US6188417B1Fluidic adapter for use with an inkjet print cartridge having an internal pressure regulatorHEWLETT PACKARD CO·Filed 1996·Granted Feb 13, 2001·39 cites·15 claims
- 3178US5434607AAttachment of nozzle plate to flexible circuit for facilitating assembly of printheadHEWLETT PACKARD CO·Filed 1993·Granted Jul 18, 1995·36 cites·22 claims
- 3278US5187500AControl of energy to thermal inkjet heating elementsHEWLETT PACKARD CO·Filed 1990·Granted Feb 16, 1993·38 cites·5 claims
- 3377US6179414B1Ink delivery system for an inkjet printheadHEWLETT PACKARD CO·Filed 1999·Granted Jan 30, 2001·34 cites·17 claims
- 3477US6155674AStructure to effect adhesion between substrate and ink barrier in ink jet printheadHEWLETT PACKARD CO·Filed 1997·Granted Dec 5, 2000·37 cites·27 claims
- 3577US5600349AMethod of reducing drive energy in a high speed thermal ink jet printerHEWLETT PACKARD CO·Filed 1995·Granted Feb 4, 1997·36 cites·10 claims
- 3676US5568171ACompact inkjet substrate with a minimal number of circuit interconnects located at the end thereofHEWLETT PACKARD CO·Filed 1994·Granted Oct 22, 1996·35 cites·39 claims
- 3775US5563642AInkjet printhead architecture for high speed ink firing chamber refillHEWLETT PACKARD CO·Filed 1994·Granted Oct 8, 1996·28 cites·22 claims
- 3875USD346829STrading card holderKEEFE BRIAN·Filed 1992·Granted May 10, 1994·21 cites·1 claims
- 3973US6523940B2Carrier for fluid ejection deviceHEWLETT PACKARD CO·Filed 2001·Granted Feb 25, 2003·12 cites·40 claims
- 4071US10507662B2Dual regulator print moduleHEWLETT PACKARD DEVELOPMENT CO·Filed 2018·Granted Dec 17, 2019·0 cites·20 claims
- 4171US6273560B1Print cartridge coupling and reservoir assembly for use in an inkjet printing system with an off-axis ink supplyHEWLETT PACKARD CO·Filed 1996·Granted Aug 14, 2001·30 cites·28 claims
- 4269US5619236ASelf-cooling printhead structure for inkjet printer with high density high frequency firing chambersHEWLETT PACKARD CO·Filed 1996·Granted Apr 8, 1997·23 cites·26 claims
- 4368US6209991B1Transition metal carbide films for applications in ink jet printheadsHEWLETT PACKARD CO·Filed 1997·Granted Apr 3, 2001·25 cites·24 claims
- 4466US5953029AInk delivery system for an inkjet printheadHEWLETT PACKARD CO·Filed 1997·Granted Sep 14, 1999·18 cites·12 claims
- 4564US6328428B1Ink-jet printhead and method of producing sameHEWLETT PACKARD CO·Filed 1999·Granted Dec 11, 2001·21 cites·11 claims
- 4663US2025223634A1A polymerase chain reaction (pcr) well including a wall to heat in different temperature phasesHEWLETT PACKARD DEVELOPMENT CO·Filed 2022·Application pending·0 cites
- 4763US2021322991A1Rapid thermal cyclingHEWLETT PACKARD DEVELOPMENT CO·Filed 2018·Application pending·0 cites
- 4862US6843552B2Electrical circuit for printhead assemblyHEWLETT PACKARD DEVELOPMENT CO·Filed 2003·Granted Jan 18, 2005·7 cites·32 claims
- 4961US12031915B2Modular and tiled optical sensorsHEWLETT PACKARD DEVELOPMENT CO·Filed 2019·Granted Jul 9, 2024·0 cites·15 claims
- 5061US5625396AInk delivery method for an inkjet print cartridgeHEWLETT PACKARD CO·Filed 1994·Granted Apr 29, 1997·12 cites·26 claims
Showing the top 50 of 65 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →