Inventor

NAKAMATSU HIROKI

JP12 patents

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

RICOH CO LTD

3 patents

US8019268B2Sep 13, 2011

Polarity controlling device, and cleaner and image forming apparatus using the polarity controlling device

RICOH CO LTD11 citations84

US7903995B2Mar 8, 2011

Cleaning device, image forming apparatus, and process cartridge

RICOH CO LTD10 citations84

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

KOGURE SEIICHI

2 patents

US9042779B2May 26, 2015

Transfer belt device and image forming apparatus including the same

KOGURE SEIICHI5 citations71

US8467709B2Jun 18, 2013

Image forming apparatus having a movably supported transfer belt detector

KOGURE SEIICHI3 citations61

KUMAGAI NAOHIRO

2 patents

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

NARUSE OSAMU

2 patents

US8190077B2May 29, 2012

Cleaning device and image forming apparatus

NARUSE OSAMU4 citations60

US8326174B2Dec 4, 2012

Cleaning unit for an electrophotographic image forming apparatus having a polarity control member

NARUSE OSAMU0 citations50

RICOH KK

1 patent

US7817954B2Oct 19, 2010

Cleaning unit, image carrier unit including same, and image forming apparatus including same

RICOH KK11 citations84

NAKAMATSU HIROKI

1 patent

US8457536B2Jun 4, 2013

Transfer device and image forming apparatus including same

NAKAMATSU HIROKI4 citations56

WADA YUUJI

1 patent

US10281848B2May 7, 2019

Image forming apparatus and image forming method

WADA YUUJI0 citations41