Inventor
HAYAKAWA KUNIO
JP41 patents
⚠️ This page may combine multiple inventors who share the name “HAYAKAWA KUNIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
32 patentsUS6400492B1Jun 4, 2002
Electrophoretic display liquid, and electrophoretic display medium, method and device using the liquid
RICOH KK200 citations99
US6514328B1Feb 4, 2003
Marking ink composition and display medium using the same
RICOH KK111 citations97
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
US7338919B2Mar 4, 2008
Reversible thermosensitive recording medium and device, and image processing method and apparatus using the reversible thermosensitive recording medium
RICOH KK20 citations92
US7238642B2Jul 3, 2007
Reversible thermosensitive recording medium, label and member, and, image processing apparatus and method
RICOH KK18 citations92
US6180560B1Jan 30, 2001
Thermosensitive recording material and color developer compound therefor
RICOH KK19 citations92
US5722029AFeb 24, 1998
Image forming apparatus
RICOH KK68 citations92
US5489501AFeb 6, 1996
Recording composition
RICOH KK28 citations92
US5447900ASep 5, 1995
Thermosensitive recording material
RICOH KK32 citations92
US5446011AAug 29, 1995
Thermosensitive recording material
RICOH KK25 citations92
US5306687AApr 26, 1994
Thermosensitive recording material
RICOH KK29 citations92
US4985345AJan 15, 1991
Recording material
RICOH KK63 citations92
US6846619B2Jan 25, 2005
Dye dispersion liquid and thermosensitive recording material using the same
RICOH KK20 citations90
US7422996B2Sep 9, 2008
Reversible thermosensitive recording medium, reversible thermosensitive recording label, reversible thermosensitive recording member, image-processing apparatus and image-processing method
RICOH KK14 citations84
US5024699AJun 18, 1991
Leuco dyes and recording materials using the same
RICOH KK18 citations81
US6395680B1May 28, 2002
Composition of aromatic carboxylic acid compounds and thermosensitive recording material using the same
RICOH KK15 citations79
US6710015B2Mar 23, 2004
Thermosensitive recording material
RICOH KK10 citations74
US7585813B2Sep 8, 2009
Reversible thermosensitive recording medium, label and member, and image processing apparatus and method
RICOH KK7 citations73
US4925828AMay 15, 1990
Leuco dyes and recording materials using the same
RICOH KK6 citations73
US6747170B2Jun 8, 2004
Thermosensitive recording material and color developer compound therefor
RICOH KK2 citations63
US5126486AJun 30, 1992
Phenolic compounds
RICOH KK4 citations63
US4981970AJan 1, 1991
Coloring phthalide compounds
RICOH KK3 citations63
US4978651ADec 18, 1990
Phenolic compounds and recording material comprising the same
RICOH KK4 citations63
US4940691AJul 10, 1990
Coloring phthalide compounds and recording materials using the compounds as coloring component
RICOH KK4 citations63
US4880762ANov 14, 1989
Coloring phthalide compounds, method of producing the compounds and recording materials using any of the compounds as coloring component
RICOH KK2 citations63
US7432223B2Oct 7, 2008
Reversible thermosensitive recording medium, information storage material, reversible thermosensitive recording label, image processing method and image processing device
RICOH KK2 citations62
US7456132B2Nov 25, 2008
Phenol compound, reversible thermosensitive recording medium, reversible thermosensitive recording label, reversible thermosensitive recording member, image-processing apparatus and imaging-processing method
RICOH KK6 citations61
US5515171AMay 7, 1996
Remote-controlled copying apparatus having facsimile interface unit
RICOH KK6 citations59
US7071145B2Jul 4, 2006
Thermosensitive recording material, and synthesis method of oligomer composition for the recording material
RICOH KK1 citations52
US7071142B2Jul 4, 2006
Thermal recording material
RICOH KK0 citations52
US6878671B2Apr 12, 2005
Thermosensitive recording material, and synthesis method of oligomer composition for the recording material
RICOH KK0 citations52