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Inventor

Keisuke Kubota

Inventor
Kanagawa, JP

Overview

42→
Patents
2004–2019
Patent span
Physics
Primary field (CPC G)

Patents· 42 as inventor

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

G03Gprimary
G03GElectrography86%
H01FMagnets7%
Y10TTechnical subjects covered by former us classification5%
H04NPictorial communication, e.g. television2%
PatentTitleYear
10,481,530Separation member, separation device, fixing device, and image forming apparatus201910,394,169Fixing device and image forming apparatus201910,095,166Fixing device and image forming apparatus201810,088,786Fixing device and image forming apparatus201810,012,937Fixing device and image forming apparatus including a fixing belt, a presser, and a gap retainer201810,012,936Fixing device and image forming apparatus20189,996,035Fixing device and image forming apparatus with a movable presser which moves a fixing belt20189,939,761Fixing device and image forming apparatus that include a separation aid disposed downstream from the fixing nip20189,811,034'Image forming apparatus, image forming method, and recording medium storing image forming program'20179,733,600'Fixing device and image forming apparatus'20179,601,255'Amorphous core transformer'20179,563,155'Cooling device and image forming apparatus incorporating the cooling device'20179,519,249'Fixing device and image forming apparatus'20169,389,560'Fixing device including a separator to separate a recording medium from a pressure rotator and image forming apparatus including the fixing device'20169,316,979'Fixing device and image forming apparatus'20169,268,276'Fixing device and image forming apparatus that include a separator disposed downstream from a fixing nip'20169,244,431'Fixing device and image forming apparatus'20169,230,729'Transformer, amorphous transformer and method of manufacturing the transformer'20169,207,601'Control method, fixing device and image forming apparatus incorporating same'20159,000,877'Transformer, amorphous transformer and method of manufacturing the transformer'20158,897,685'Cleaning system, fixing device, and image forming apparatus incorporating same'20148,886,097'Cleaning system control method, fixing device, and image forming apparatus incorporating same'20148,837,999'Cleaning system control method, fixing device, and image forming apparatus incorporating same'20148,725,019'Fixing device, fixing device control method, and image forming apparatus'20148,699,904'Fixing device and image forming apparatus capable of suppressing variation image density'20148,666,270'Image forming apparatus'20148,346,143'Fixing device and image forming apparatus capable of effectively circulating and applying oil for fixing'20138,224,220'Fixing device and image forming apparatus capable of adjusting amount of oil applied for fixing'20128,112,022'Fixing device, image forming apparatus, and image fixing method capable of stably applying oil for fixing without adhering oil to sheet'20128,027,627'Fixing device and image forming apparatus with improved mechanism for stably applying oil for fixing'20118,023,850'Image forming apparatus capable of stably applying oil for fixing'20117,945,198'Fixing device and image forming apparatus comprising same'20117,548,718'Fixing device for fixing an unfixed toner image on a recording medium and image forming apparatus including the fixing device'20097,324,778'Fixing device including heating roller and pressure roller'20087,106,983'Color image forming apparatus'20066,829,449'Image forming apparatus with transfer bias inverting function'20046,813,462'Electro-photographic developing unit'20046,792,235'Electrophotographic apparatus including transferring device'20046,760,553'Electrophotographic cluster printing system with controlled image quality'20046,738,586'Print control method of electrophotograph and image formation apparatus with potential sensor using the method'20046,686,943'Control method of an electrophotographic record apparatus and image formation apparatus including controlling developing bias and photoconductor surface potential'20046,684,036'Image forming apparatus'2004

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2004–2008Based in Ibaraki, JP· patent location history
2004–2014Based in Hitachinaka, JP· patent location history
2009–2011Based in Tokyo, JP· patent location history
2011–2019Patents assigned to RICOH CO LTD (28)· patent assignee history
2012–2018Patents assigned to KUBOTA KEISUKE (25)· patent assignee history
2012–2018Patents assigned to OKAMOTO MASAMI (16)· patent assignee history
2012–2018Patents assigned to NOZAWA KENJI (12)· patent assignee history
2014–2019Based in Kanagawa, JP· patent location history
2015–2017Based in Tainai, JP· patent location history
2016–2018Patents assigned to YUASA SHUUTAROH (12)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
RICOH CO LTD282011–2019
KUBOTA KEISUKEself252012–2018
OKAMOTO MASAMI162012–2018
NOZAWA KENJI122012–2018
YUASA SHUUTAROH122016–2018
Locations
LocationPatentsSpan
Kanagawa, JP222014–2019
Ibaraki, JP82004–2008
Hitachinaka, JP62004–2014
Tainai, JP32015–2017
Tokyo, JP22009–2011