P

Inventor

KUMAGAI NAOHIRO

JP76 patents
⚠️ This page may combine multiple inventors who share the name “KUMAGAI NAOHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

RICOH KK

19 patents
US7266324B2Sep 4, 2007

Charging device, and process cartridge and image forming apparatus using the charging device

RICOH KK18 citations93
US7139504B2Nov 21, 2006

Charging device, and process cartridge and image forming apparatus using the charging device

RICOH KK24 citations93
US7050741B2May 23, 2006

Imaging apparatus, and toner and process cartridge used in the imaging apparatus

RICOH KK20 citations93
US7272354B2Sep 18, 2007

Cleaning unit and image forming apparatus having multiple cleaning blades

RICOH KK27 citations92
US7228099B2Jun 5, 2007

Cleaning device for cleaning a surface of an image support body

RICOH KK21 citations92
US7149465B2Dec 12, 2006

Cleaning unit, process cartridge, image forming apparatus, and toner

RICOH KK26 citations92
US7110696B2Sep 19, 2006

Cleaning unit, process cartridge, and image forming apparatus

RICOH KK27 citations92
US7062194B2Jun 13, 2006

Charging device, and process cartridge and image forming apparatus including the charging device

RICOH KK31 citations92
US7430377B2Sep 30, 2008

Image forming apparatus and process cartridge having a detachable unit body having a lubricant applying unit and image carrier mounted thereon

RICOH KK12 citations84
US7295796B1Nov 13, 2007

Image forming apparatus having a temporary toner holding device and a toner collecting device

RICOH KK14 citations84
US7218877B2May 15, 2007

Charging device, and process cartridge and image forming apparatus including the charging device using the same

RICOH KK12 citations84
US7085528B2Aug 1, 2006

Cleaning unit, process cartridge, and image forming apparatus

RICOH KK12 citations84
US7542712B2Jun 2, 2009

Lubricant applicator, and image forming apparatus and process cartridge using the lubricant applicator, and method for assembling the process cartridge

RICOH KK15 citations83
US7493075B2Feb 17, 2009

Cleaning device, process cartridge and image forming apparatus

RICOH KK13 citations83
US7386257B2Jun 10, 2008

Imaging apparatus, and toner and process cartridge used in the imaging apparatus

RICOH KK7 citations74
US7130564B2Oct 31, 2006

Method and apparatus for image forming capable of removing residual toner without using a toner cleaning system, process cartridge for use in the apparatus and toner used for the image forming

RICOH KK8 citations74
US7065316B2Jun 20, 2006

Cleaning unit, process cartridge, image forming apparatus, and toner

RICOH KK10 citations74
US7400844B2Jul 15, 2008

Image forming apparatus and process cartridge with a cleaner for removing toner from an image bearing member

RICOH KK2 citations63
US7831189B2Nov 9, 2010

Lubricant applying unit, a process cartridge including the same, and an image forming apparatus provided with the process cartridge including the same

RICOH KK6 citations62

KUMAGAI NAOHIRO

8 patents
US11175610B2Nov 16, 2021

Image forming apparatus

KUMAGAI NAOHIRO0 citations62
US11112734B2Sep 7, 2021

Belt device, belt regulator, roller unit, and image forming apparatus

KUMAGAI NAOHIRO0 citations62
US10955771B2Mar 23, 2021

Belt control device and image forming apparatus incorporating same

KUMAGAI NAOHIRO1 citations62
US8452199B2May 28, 2013

Waste toner collector, image forming apparatus, and waste toner collection container

KUMAGAI NAOHIRO4 citations62
US8190041B2May 29, 2012

Image forming apparatus

KUMAGAI NAOHIRO4 citations62
US11789388B2Oct 17, 2023

Image forming apparatus

KUMAGAI NAOHIRO0 citations52
US8620199B2Dec 31, 2013

Cleaning blade, cleaning device, process cartridge, image forming apparatus, and holder member

KUMAGAI NAOHIRO0 citations52
US10152001B2Dec 11, 2018

Image forming apparatus

KUMAGAI NAOHIRO1 citations51

ASAHI GLASS CO LTD

2 patents
US7825166B2Nov 2, 2010

Flexible polyurethane foam, process for its production, and seat for automobile using the flexible polyurethane foam

ASAHI GLASS CO LTD33 citations92
US8357730B2Jan 22, 2013

Process for producing flexible polyurethane foam

ASAHI GLASS CO LTD3 citations62

SASAKI TAKAYUKI

2 patents
US8487015B2Jul 16, 2013

Flexible polyurethane foam and process for its production

SASAKI TAKAYUKI8 citations83
US8642668B2Feb 4, 2014

Polymer-dispersed polyol and process for producing flexible polyurethane foam

SASAKI TAKAYUKI4 citations71

RICOH CO LTD

2 patents
US10185255B2Jan 22, 2019

Image forming apparatus and image forming method for controlling a secondary transfer bias according to recording sheet type

RICOH CO LTD2 citations73
US9454126B2Sep 27, 2016

Cleaning device and image forming apparatus including same

RICOH CO LTD0 citations52

SUGIURA KENJI

2 patents
US9835987B2Dec 5, 2017

Image forming apparatus and transfer bias control

SUGIURA KENJI2 citations72
US9632461B2Apr 25, 2017

Image forming apparatus controlling transfer bias based on temperature and humidity

SUGIURA KENJI2 citations72

WADA YUUJI

2 patents
US9740156B2Aug 22, 2017

Image forming apparatus that adjusts a transfer bias according to surface properties of a transfer target

WADA YUUJI2 citations72
US9395658B2Jul 19, 2016

Image forming apparatus

WADA YUUJI2 citations61

KOGURE SEIICHI

2 patents
US9360807B2Jun 7, 2016

Image forming apparatus

KOGURE SEIICHI3 citations72
US10228639B2Mar 12, 2019

Image forming apparatus with a support to adjust a rotator and a guide

KOGURE SEIICHI0 citations51

OHSUGI TATSUYA

2 patents
US9817341B2Nov 14, 2017

Image forming apparatus

OHSUGI TATSUYA2 citations71
US9459564B2Oct 4, 2016

Image forming apparatus

OHSUGI TATSUYA2 citations61

FUJITA JUNPEI

2 patents
US10120304B2Nov 6, 2018

Belt device including support portions and an adjuster to adjust positions of the support portions

FUJITA JUNPEI0 citations51
US9811036B2Nov 7, 2017

Belt device and image forming apparatus including same

FUJITA JUNPEI0 citations51

KOCHI NAOTO

1 patent
US9645530B2May 9, 2017

Image forming apparatus

KOCHI NAOTO2 citations71

YOSHINO KAORU

1 patent
US9176457B2Nov 3, 2015

Image forming apparatus and waste toner conveying device incorporated in same

YOSHINO KAORU5 citations67

KARASAWA SHINYA

1 patent
US8204400B2Jun 19, 2012

Charging device capable of efficiently charging image carrier

KARASAWA SHINYA5 citations62

YOGOSAWA KAZUKI

1 patent
US9248638B2Feb 2, 2016

Cleaning device and image forming apparatus incorporating same

YOGOSAWA KAZUKI2 citations61

FUJIMORI AKIRA

1 patent
US9081347B2Jul 14, 2015

Lubricant supplying device, image forming apparatus, and process cartridge

FUJIMORI AKIRA3 citations61

HATORI SATOSHI

1 patent
US9068693B2Jun 30, 2015

Lubricant supplying device, image forming apparatus, and process cartridge

HATORI SATOSHI3 citations61

GOTOH RYOHTA

1 patent
US8909122B2Dec 9, 2014

Lubricant supplying device, image forming apparatus, and process cartridge

GOTOH RYOHTA2 citations60

Showing the top 50 of 76 patents by PatentIndex Score.