Inventor

HATTA HIROTAKA

JP15 patents

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

RICOH KK

6 patents

US6546228B2Apr 8, 2003

Image forming apparatus conveniently upgradable to a duplex image forming apparatus

RICOH KK21 citations91

US5697038ADec 9, 1997

Cleaner and toner magazine for electrophotographic apparatus

RICOH KK7 citations73

US5555081ASep 10, 1996

Cleaner and toner magazine for electrophotographic apparatus

RICOH KK4 citations73

US5852762ADec 22, 1998

Toner magazine and cleaner for an electrophotographic apparatus

RICOH KK14 citations72

US7603053B2Oct 13, 2009

Image forming apparatus

RICOH KK2 citations62

US5873021AFeb 16, 1999

Cleaner and toner magazine for electrophotographic apparatus

RICOH KK3 citations62

KOJIMA TAKESHI

2 patents

US9170554B2Oct 27, 2015

Cleaning device, process cartridge, and image forming apparatus

KOJIMA TAKESHI1 citations51

US9268292B2Feb 23, 2016

Image forming apparatus including first and second bias voltage supply devices

KOJIMA TAKESHI0 citations40

ASAOKA AKIRA

1 patent

US9201378B2Dec 1, 2015

Cleaning unit, process cartridge incorporating same, and image forming apparatus incorporating same

ASAOKA AKIRA4 citations72

HONJOH KENJI

1 patent

US8396383B2Mar 12, 2013

Image forming apparatus and process cartridge

HONJOH KENJI6 citations71

KIMURA HIDEKI

1 patent

US12510859B2Dec 30, 2025

Image forming apparatus and coating-film adjusting method

KIMURA HIDEKI0 citations60

RICOH CO LTD

1 patent

US7953362B2May 31, 2011

Image forming apparatus, process cartridge, and lubricant applicator

RICOH CO LTD1 citations52

UENISHI HIROYUKI

1 patent

US9141020B2Sep 22, 2015

Charger positioning adjuster and image forming apparatus incorporating same

UENISHI HIROYUKI0 citations50

GOTO YUTAKA

1 patent

US12416894B2Sep 16, 2025

Image forming apparatus

GOTO YUTAKA0 citations47

ISHIZUKA YUSUKE

1 patent

US9195204B2Nov 24, 2015

Image forming apparatus

ISHIZUKA YUSUKE0 citations39