P

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 patents
US9193882B2Nov 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 patents

YAMADA YOICHI

3 patents

OKADA HIDEKI

1 patent

SAKURAI NOBORU

1 patent