Inventor

KEEFE BRIAN J

US53 patents

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

KEEFE BRIAN J

HEWLETT PACKARD CO

Electrical connection for wide-array inkjet printhead assembly with hybrid carrier for printhead dies

Ink delivery system for an inkjet printhead

Reliable high performance drop generator for an inkjet printhead

Ink delivery system for an inkjet pen having an automatic pressure regulation system

Reliable high performance drop generator for an inkjet printhead

Inkjet printhead assembly having planarized mounting layer for printhead dies

Inkjet printhead assembly with hybrid carrier for printhead dies

Stable substrate structure for a wide swath nozzle array in a high resolution inkjet printer

Stable substrate structure for a wide swath nozzle array in a high resolution inkjet printer

Compact inkjet substrate with centrally located circuitry and edge feed ink channels

Stable substrate structure for a wide swath nozzle array in a high resolution inkjet printer

High density nozzle array for inkjet printhead

Inkjet printhead architecture for high frequency operation

Ink channel structure for inkjet printhead

Inkjet printhead

Thermal ink jet tab circuit having a plurality of trace groups wherein adjacent traces in each group are staggered

Inkjet printhead architecture for high speed and high resolution printing

Edge feed ink delivery thermal inkjet printhead structure and method of fabrication

Ink-jet printhead and method of producing same

Ink delivery system for an inkjet printhead

Bubble tolerant manifold design for inkjet cartridge

Ink delivery system for an inkjet printhead

Method of reducing drive energy in a high speed thermal ink jet printer

Inkjet printhead with improved seal arrangement

Attachment of nozzle plate to flexible circuit for facilitating assembly of printhead

Print cartridge coupling and reservoir assembly for use in an inkjet printing system with an off-axis ink supply

Transition metal carbide films for applications in ink jet printheads

Fluidic adapter for use with an inkjet print cartridge having an internal pressure regulator

Self-cooling printhead structure for inkjet printer with high density high frequency firing chambers

Compact inkjet substrate with a minimal number of circuit interconnects located at the end thereof

Inkjet printhead architecture for high speed ink firing chamber refill

Control of energy to thermal inkjet heating elements

Substrate with fluid passage supports

Hybrid carrier for wide-array inkjet printhead assembly

Coplanar mounting of printhead dies for wide-array inkjet printhead assembly

Structure to effect adhesion between substrate and ink barrier in ink jet printhead

Carrier for fluid ejection device

Ink delivery method for an inkjet print cartridge

Gas flush to eliminate residual bubbles

HEWLETT PACKARD DEVELOPMENT CO

Electrical circuit for wide-array inkjet printhead assembly

Substrate for fluid ejection devices

Substrate for fluid ejection devices

Dual regulator print module

Dual regulator print module

Electrical circuit for printhead assembly

Ink-jet printhead and method for producing the same

Method of forming substrate with fluid passage supports

Inkjet printing method and apparatus

Ink-jet printhead and method for producing the same

KEEFE BRIAN J

Dual regulator print module