Inventor
ARUGA TOMOHIRO
JP31 patents
⚠️ This page may combine multiple inventors who share the name “ARUGA TOMOHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SEIKO EPSON CORP
21 patentsUS9193882B2Nov 24, 2015
Ink composition for ink jet recording, ink supply system, and ink jet recording apparatus
SEIKO EPSON CORP8 citations84
US7565099B2Jul 21, 2009
Developing device and image forming apparatus having a toner-particle bearing roller with a helical groove portion
SEIKO EPSON CORP17 citations83
US7555252B2Jun 30, 2009
Image forming apparatus that prevents conspicuous unevenness in image density
SEIKO EPSON CORP8 citations83
US12486415B2Dec 2, 2025
Ink jet textile-printing ink composition, recording method, and recorded material
SEIKO EPSON CORP0 citations62
US11572485B2Feb 7, 2023
Ink set
SEIKO EPSON CORP0 citations61
US11511545B2Nov 29, 2022
Ink jet recording apparatus, ink jet recording method, and ink composition
SEIKO EPSON CORP0 citations61
US11505711B2Nov 22, 2022
Ink jet recording apparatus, ink jet recording method, and ink composition
SEIKO EPSON CORP0 citations61
US12215241B2Feb 4, 2025
Printing ink jet ink composition and recording method
SEIKO EPSON CORP0 citations56
US9334412B2May 10, 2016
Ink composition for ink jet recording, ink supply system, and ink jet recording apparatus
SEIKO EPSON CORP1 citations52
US8991987B2Mar 31, 2015
Fluid ejecting apparatus and cleaning method
SEIKO EPSON CORP0 citations52
US9004665B2Apr 14, 2015
Ink jet recording ink and ink jet recording system
SEIKO EPSON CORP1 citations51
US11578224B2Feb 14, 2023
Ink set
SEIKO EPSON CORP0 citations50
US11499064B2Nov 15, 2022
Ink jet recording apparatus, ink jet recording method, and ink composition
SEIKO EPSON CORP0 citations50
US11479056B2Oct 25, 2022
Ink jet recording apparatus, ink jet recording method, and ink composition
SEIKO EPSON CORP0 citations50
US9023140B2May 5, 2015
Ink jet ink set and ink jet recording system
SEIKO EPSON CORP1 citations49
US7945194B2May 17, 2011
Image forming apparatus and image forming system reducing electrical discharge
SEIKO EPSON CORP0 citations42
US10414931B2Sep 17, 2019
Ink composition, ink set, and ink jet recording device
SEIKO EPSON CORP0 citations41
US7991319B2Aug 2, 2011
Image forming apparatus with seal member that abuts surface of toner carrier roller having convex and concave sections
SEIKO EPSON CORP0 citations41
US7925195B2Apr 12, 2011
Method of manufacturing toner carrier roller, developer apparatus, and image forming apparatus
SEIKO EPSON CORP0 citations41
US7315703B2Jan 1, 2008
Image forming apparatus, image forming system, and image forming method
SEIKO EPSON CORP0 citations41
US10717888B2Jul 21, 2020
Ink composition, ink set, recording method, and ink jet recording apparatus
SEIKO EPSON CORP0 citations37
ARUGA TOMOHIRO
5 patentsUS8790458B2Jul 29, 2014
Ink set and droplet ejection apparatus using the ink set
ARUGA TOMOHIRO4 citations71
US8651647B2Feb 18, 2014
Liquid ejecting apparatus, and nozzle recovery method used in liquid ejecting apparatus
ARUGA TOMOHIRO2 citations61
US8534808B2Sep 17, 2013
Liquid ejecting apparatus and cleaning method in liquid ejecting apparatus
ARUGA TOMOHIRO0 citations40
US8175504B2May 8, 2012
Image forming apparatus and image forming method
ARUGA TOMOHIRO0 citations40
US8126355B2Feb 28, 2012
Developing device with seal member that abuts toner carrier roller
ARUGA TOMOHIRO0 citations40
YAMADA YOICHI
3 patentsUS8401443B2Mar 19, 2013
Toner-particle bearing roller, developing device, and image forming apparatus
YAMADA YOICHI0 citations51
US8086150B2Dec 27, 2011
Toner particle-bearing roller with projection portion, developing device having such toner particle-bearing roller, and image forming apparatus having such developing device
YAMADA YOICHI0 citations51
US8311459B2Nov 13, 2012
Developing apparatus, image forming apparatus, image forming method, and toner
YAMADA YOICHI0 citations41