LexDanaLexDanabeta
Inventor

Naohiro Kumagai

Inventor
Kanagawa, JP

Overview

73→
Patents
2006–2021
Patent span
Physics
Primary field (CPC G)

Patents· 73 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G03Gprimary
G03GElectrography78%
F16NLubricating6%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds4%
C08JWorking-up4%
B41FPrinting machines or presses2%
B08BCleaning in general1%
C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds1%
C08LCompositions of macromolecular compounds1%
H05KPrinted circuits1%
Y10TTechnical subjects covered by former us classification1%
PatentTitleYear
11,112,734Belt device, belt regulator, roller unit, and image forming apparatus202110,955,771Belt control device and image forming apparatus incorporating same202110,281,848Image forming apparatus and image forming method201910,228,639Image forming apparatus with a support to adjust a rotator and a guide201910,185,255Image forming apparatus and image forming method for controlling a secondary transfer bias according to recording sheet type201910,152,001Image forming apparatus201810,120,304Belt device including support portions and an adjuster to adjust positions of the support portions201810,101,690Image forming apparatus20189,897,943'Belt unit, transfer unit, and image forming apparatus including a pressing member that presses an edge of a belt'20189,835,987Image forming apparatus and transfer bias control20179,817,341'Image forming apparatus'20179,811,046'Image forming apparatus'20179,811,036'Belt device and image forming apparatus including same'20179,766,575'Image forming apparatus'20179,740,156'Image forming apparatus that adjusts a transfer bias according to surface properties of a transfer target'20179,720,364'Image forming apparatus'20179,720,355'Image forming apparatus'20179,696,662'Cleaning device and image forming apparatus incorporating same'20179,690,246'Image forming apparatus including contact members disposed side by side at positions opposing a guide unit'20179,645,530'Image forming apparatus'20179,632,461'Image forming apparatus controlling transfer bias based on temperature and humidity'20179,459,564'Image forming apparatus'20169,454,126'Cleaning device and image forming apparatus including same'20169,423,749'Image forming apparatus with a fulcrum that pivotally supports an image bearer and detector'20169,423,724'Pressing device, in an image forming apparatus that includes an adjuster connected to two lateral plates'20169,405,271'Cleaning device and image forming apparatus incorporating same'20169,395,658'Image forming apparatus'20169,383,691'Image forming apparatus including a transfer bias controller'20169,360,807'Image forming apparatus'20169,329,533'Cleaning device and image forming apparatus including same'20169,256,190'Lubricant supplying device, image forming apparatus, and process cartridge'20169,256,167'Image forming apparatus'20169,248,638'Cleaning device and image forming apparatus incorporating same'20169,213,271'Cleaner, and image forming apparatus using the cleaner'20159,207,625'Lubricant supply device, process unit, image forming apparatus, and process unit manufacturing method'20159,176,457'Image forming apparatus and waste toner conveying device incorporated in same'20159,128,452'Lubricant supply system, image forming apparatus, and process cartridge'20159,104,171'Detachable unit and image forming apparatus incorporating same'20159,081,347'Lubricant supplying device, image forming apparatus, and process cartridge'20159,068,693'Lubricant supplying device, image forming apparatus, and process cartridge'20159,063,500'Lubricant applicator, image forming apparatus, and process cartridge'20159,052,669'Lubricant applicator, image forming apparatus, and process cartridge'20159,008,546'Image carrier, process cartridge, and image forming apparatus'20158,909,122'Lubricant supplying device, image forming apparatus, and process cartridge'20148,855,507'Lubricant supplying device, and image forming apparatus'20148,642,668'Polymer-dispersed polyol and process for producing flexible polyurethane foam'20148,620,199'Cleaning blade, cleaning device, process cartridge, image forming apparatus, and holder member'20138,487,015'Flexible polyurethane foam and process for its production'20138,472,856'Image forming apparatus'20138,452,199'Waste toner collector, image forming apparatus, and waste toner collection container'20138,357,730'Process for producing flexible polyurethane foam'20138,204,400'Charging device capable of efficiently charging image carrier'20128,190,041'Image forming apparatus'20127,831,189'Lubricant applying unit, a process cartridge including the same, and an image forming apparatus provided with the process cartridge including the same'20107,825,166'Flexible polyurethane foam, process for its production, and seat for automobile using the flexible polyurethane foam'20107,542,712'Lubricant applicator, and image forming apparatus and process cartridge using the lubricant applicator, and method for assembling the process cartridge'20097,493,075'Cleaning device, process cartridge and image forming apparatus'20097,430,377'Image forming apparatus and process cartridge having a detachable unit body having a lubricant applying unit and image carrier mounted thereon'20087,400,844'Image forming apparatus and process cartridge with a cleaner for removing toner from an image bearing member'20087,386,257'Imaging apparatus, and toner and process cartridge used in the imaging apparatus'20087,295,796'Image forming apparatus having a temporary toner holding device and a toner collecting device'20077,272,354'Cleaning unit and image forming apparatus having multiple cleaning blades'20077,266,324'Charging device, and process cartridge and image forming apparatus using the charging device'20077,228,099'Cleaning device for cleaning a surface of an image support body'20077,218,877'Charging device, and process cartridge and image forming apparatus including the charging device using the same'20077,149,465'Cleaning unit, process cartridge, image forming apparatus, and toner'20067,139,504'Charging device, and process cartridge and image forming apparatus using the charging device'20067,130,564'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'20067,110,696'Cleaning unit, process cartridge, and image forming apparatus'20067,085,528'Cleaning unit, process cartridge, and image forming apparatus'20067,065,316'Cleaning unit, process cartridge, image forming apparatus, and toner'20067,062,194'Charging device, and process cartridge and image forming apparatus including the charging device'20067,050,741'Imaging apparatus, and toner and process cartridge used in the imaging apparatus'2006

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2006–2021Based in Kanagawa, JP· patent location history
2006–2013Based in Tokyo, JP· patent location history
2006–2008Based in Kawasaki, JP· patent location history
2009–2013Based in Machida, JP· patent location history
2010–2014Based in Kamisu, JP· patent location history
2012–2021Patents assigned to KUMAGAI NAOHIRO (51)· patent assignee history
2012–2021Patents assigned to RICOH CO LTD (50)· patent assignee history
2015–2019Patents assigned to FUJITA JUNPEI (29)· patent assignee history
2015–2019Patents assigned to WADA YUUJI (29)· patent assignee history
2015–2019Patents assigned to YOGOSAWA KAZUKI (29)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
KUMAGAI NAOHIROself512012–2021
RICOH CO LTD502012–2021
FUJITA JUNPEI292015–2019
WADA YUUJI292015–2019
YOGOSAWA KAZUKI292015–2019
Locations
LocationPatentsSpan
Kanagawa, JP562006–2021
Tokyo, JP52006–2013
Kawasaki, JP52006–2008
Kamisu, JP42010–2014
Machida, JP32009–2013