Inventor
HARADA SHIGEYUKI
JP55 patents
⚠️ This page may combine multiple inventors who share the name “HARADA SHIGEYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
13 patentsUS6400492B1Jun 4, 2002
Electrophoretic display liquid, and electrophoretic display medium, method and device using the liquid
RICOH KK200 citations99
US6816146B2Nov 9, 2004
Electrophoretic display liquid and electrophoretic display medium and device using the liquid having predetermined different volume medium particle diameters
RICOH KK58 citations96
US6693621B1Feb 17, 2004
Electrophoretic display method, display medium, liquid and particle for display medium, display apparatus, and reversible display material
RICOH KK56 citations96
US5328754AJul 12, 1994
Thermosensitive image transfer ink sheet
RICOH KK40 citations92
US5248543ASep 28, 1993
Thermal image transfer sheet and thermal image transfer recording medium for use with clothing
RICOH KK32 citations92
US6136751AOct 24, 2000
Reversible thermosensitive recording medium, and image forming and erasing method
RICOH KK17 citations84
US7758932B2Jul 20, 2010
Liquid crystal display device and display apparatus
RICOH KK8 citations83
US5780387AJul 14, 1998
Reversible thermosensitive recording medium
RICOH KK8 citations74
US5352527AOct 4, 1994
Thermal image transfer recording medium
RICOH KK9 citations73
US5409884AApr 25, 1995
Thermal image transfer recording medium
RICOH KK12 citations72
US5260139ANov 9, 1993
Thermal image transfer recording medium
RICOH KK11 citations72
US7658979B2Feb 9, 2010
Liquid crystal alignment film composition, liquid crystal device and display apparatus
RICOH KK2 citations63
US6913709B2Jul 5, 2005
Liquid crystalline gel composition, and display medium, display device and display body using same
RICOH KK6 citations60
SHARP KK
11 patentsUS4823121AApr 18, 1989
Electroluminescent panel driving system for driving the panel's electrodes only when non-blank data is present to conserve power
SHARP KK67 citations96
US6621228B2Sep 16, 2003
EL display apparatus
SHARP KK21 citations92
US4866348ASep 12, 1989
Drive system for a thin-film el panel
SHARP KK30 citations92
US4864182ASep 5, 1989
Driving circuit for thin film EL display device
SHARP KK36 citations92
US4888523ADec 19, 1989
Driving circuit of thin membrane EL display apparatus
SHARP KK31 citations91
US4686426AAug 11, 1987
Thin-film EL display panel drive circuit with voltage compensation
SHARP KK22 citations81
US5262766ANov 16, 1993
Display unit having brightness control function
SHARP KK11 citations74
US5206631AApr 27, 1993
Method and apparatus for driving a capacitive flat matrix display panel
SHARP KK15 citations74
US4935671AJun 19, 1990
Thin-film EL display panel drive
SHARP KK9 citations74
US4914353AApr 3, 1990
Thin-film EL display panel drive circuit
SHARP KK10 citations74
US4983885AJan 8, 1991
Thin film EL display panel drive circuit
SHARP KK13 citations73
HARADA SHIGEYUKI
11 patentsUS8998400B2Apr 7, 2015
Copolymer, aqueous ink, and ink cartridge
HARADA SHIGEYUKI9 citations84
US9263682B2Feb 16, 2016
Light emitting device and display unit
HARADA SHIGEYUKI3 citations72
US9206202B2Dec 8, 2015
Carbazole derivative and semiconductor nanocrystal
HARADA SHIGEYUKI1 citations52
US10633549B2Apr 28, 2020
Ink, ink accommodating container, image forming method, and image forming device
HARADA SHIGEYUKI0 citations51
US10370548B2Aug 6, 2019
Copolymer, ink including copolymer, and ink-stored container
HARADA SHIGEYUKI0 citations51
US10035869B2Jul 31, 2018
Copolymer, aqueous ink, and ink cartridge
HARADA SHIGEYUKI0 citations51
US9896530B2Feb 20, 2018
Copolymer, coloring material dispersion, ink, and ink store container
HARADA SHIGEYUKI0 citations51
US9422437B2Aug 23, 2016
Copolymer, aqueous ink, and ink cartridge
HARADA SHIGEYUKI0 citations51
US9416284B2Aug 16, 2016
Copolymer, aqueous ink, and ink cartridge
HARADA SHIGEYUKI0 citations51
US9365670B2Jun 14, 2016
Copolymer, aqueous ink, and ink cartridge
HARADA SHIGEYUKI0 citations51
US12497530B2Dec 16, 2025
Active energy ray polymerization initiator, active energy ray curing composition, active energy ray curing ink, aqueous active energy ray curing ink, container, image forming device, image forming method, and method of manufacturing active energy ray polymerization initiator
HARADA SHIGEYUKI0 citations49
RICOH CO LTD
5 patentsUS11414557B2Aug 16, 2022
Active-energy-ray-polymerizable initiator, active-energy-ray-polymerizable composition, active-energy-ray-polymerizable ink, ink storage container, image forming method, and image forming apparatus
RICOH CO LTD0 citations63
US11661523B2May 30, 2023
Ink, ink accommodating unit, recording method, recording device, and method of manufacturing ink
RICOH CO LTD0 citations60
US11193029B2Dec 7, 2021
Ink, ink accommodating container, recording device, recording method, and recorded matter
RICOH CO LTD0 citations60
US10844235B2Nov 24, 2020
Ink, method of manufacturing ink, and ink cartridge
RICOH CO LTD0 citations52
US9850335B2Dec 26, 2017
Copolymer, aqueous ink, and ink cartridge
RICOH CO LTD0 citations52
KATOH KEITA
2 patentsMATSUYAMA AKIHIKO
2 patentsNAGAI KAZUKIYO
1 patentFUKUOKA MASAYUKI
1 patentKOIZUKA YUUSUKE
1 patentSAIGA TAKUYA
1 patentSASAKI MASAOMI
1 patentYAMAZAKI TAKUYA
1 patentShowing the top 50 of 55 patents by PatentIndex Score.