Inventor
MARKEL DAVID P
US40 patents
⚠️ This page may combine multiple inventors who share the name “MARKEL DAVID P”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HEWLETT PACKARD DEVELOPMENT CO
30 patentsUS7148182B2Dec 12, 2006
Multilayered color compositions and associated methods
HEWLETT PACKARD DEVELOPMENT CO17 citations79
US11686327B2Jun 27, 2023
Inertial pumps
HEWLETT PACKARD DEVELOPMENT CO2 citations73
US10913039B2Feb 9, 2021
Microfluidic mixer
HEWLETT PACKARD DEVELOPMENT CO2 citations73
US10197188B2Feb 5, 2019
Microfluidic valve
HEWLETT PACKARD DEVELOPMENT CO5 citations73
US10173435B2Jan 8, 2019
Fluid ejection device including recirculation system
HEWLETT PACKARD DEVELOPMENT CO1 citations73
US11911731B2Feb 27, 2024
Droplet generator
HEWLETT PACKARD DEVELOPMENT CO2 citations72
US11345162B2May 31, 2022
Fluid recirculation channels
HEWLETT PACKARD DEVELOPMENT CO4 citations72
US12480532B2Nov 25, 2025
Inertial pumps
HEWLETT PACKARD DEVELOPMENT CO0 citations62
US11278891B2Mar 22, 2022
Fluidic channels for microfluidic devices
HEWLETT PACKARD DEVELOPMENT CO1 citations62
US11260668B2Mar 1, 2022
Fluid ejection device including recirculation system
HEWLETT PACKARD DEVELOPMENT CO0 citations62
US11110456B2Sep 7, 2021
Bead packing in microfluidic channels
HEWLETT PACKARD DEVELOPMENT CO0 citations62
US10882045B2Jan 5, 2021
Polymerase chain reaction device including ejection nozzles
HEWLETT PACKARD DEVELOPMENT CO0 citations62
US10696939B2Jun 30, 2020
Cell lysis
HEWLETT PACKARD DEVELOPMENT CO1 citations62
US10308020B2Jun 4, 2019
Fluid ejection device
HEWLETT PACKARD DEVELOPMENT CO1 citations61
US11059290B2Jul 13, 2021
Fluid ejection device
HEWLETT PACKARD DEVELOPMENT CO0 citations57
US11439963B2Sep 13, 2022
Microfluidic device for fluid mixture
HEWLETT PACKARD DEVELOPMENT CO0 citations52
US11318466B2May 3, 2022
Microfluidic fluid flow in a target fluid
HEWLETT PACKARD DEVELOPMENT CO0 citations52
US11209102B2Dec 28, 2021
Microfluidic valve
HEWLETT PACKARD DEVELOPMENT CO0 citations52
US11097270B2Aug 24, 2021
Microfluidic filtering system
HEWLETT PACKARD DEVELOPMENT CO0 citations52
US10807376B2Oct 20, 2020
Fluid ejection device including recirculation system
HEWLETT PACKARD DEVELOPMENT CO0 citations52
US10495507B2Dec 3, 2019
Drop ejection based flow sensor calibration
HEWLETT PACKARD DEVELOPMENT CO0 citations52
US10286366B2May 14, 2019
Microfluidic mixing device
HEWLETT PACKARD DEVELOPMENT CO0 citations52
US10272691B2Apr 30, 2019
Microfluidic systems and networks
HEWLETT PACKARD DEVELOPMENT CO0 citations52
US9981265B2May 29, 2018
Microfluidic mixing device
HEWLETT PACKARD DEVELOPMENT CO1 citations52
US10850511B2Dec 1, 2020
Fluid ejection device
HEWLETT PACKARD DEVELOPMENT CO0 citations51
US10646868B2May 12, 2020
Microfluidic filtering
HEWLETT PACKARD DEVELOPMENT CO0 citations51
US10252527B2Apr 9, 2019
Noncircular inkjet nozzle
HEWLETT PACKARD DEVELOPMENT CO0 citations51
US10415086B2Sep 17, 2019
Polymerase chain reaction systems
HEWLETT PACKARD DEVELOPMENT CO0 citations47
US10857536B2Dec 8, 2020
Polymerase chain reaction device
HEWLETT PACKARD DEVELOPMENT CO0 citations42
US10780705B2Sep 22, 2020
Fluid ejection device
HEWLETT PACKARD DEVELOPMENT CO0 citations40
GOVYADINOV ALEXANDER
3 patentsUS9090084B2Jul 28, 2015
Fluid ejection device including recirculation system
GOVYADINOV ALEXANDER36 citations98
US8651646B2Feb 18, 2014
Fluid ejection assembly with circulation pump
GOVYADINOV ALEXANDER5 citations84
US10132303B2Nov 20, 2018
Generating fluid flow in a fluidic network
GOVYADINOV ALEXANDER0 citations42