LexDanaLexDanabeta
Inventor

Tsukuru Kai

Inventor
Kanagawa, JP

Overview

62→
Patents
1992–2021
Patent span
Physics
Primary field (CPC G)

Patents· 62 as inventor

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

G03Gprimary
G03GElectrography87%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%
A61KPreparations for medical, dental or toiletry purposes1%
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations1%
B82YSpecific uses or applications of nanostructures1%
C07KPeptides1%
C12NMicroorganisms or enzymes1%
PatentTitleYear
11,059,857Chromatographic method for collecting blood coagulation factor VII with high yield202110,474,062Powder container and image forming apparatus201910,466,623Powder container, powder supply device and image forming apparatus201910,281,843Powder container, powder supply device and image forming apparatus20199,983,509Powder container, powder supply device and image forming apparatus20189,740,139'Powder container including a container portion to be engaged with a powder replenishing device'20179,547,258'Powder container, powder supply device and image forming apparatus'20179,482,987'Powder container, powder supply device and image forming apparatus'20169,405,221'Powder container and image forming apparatus incorporating same'20169,285,763'Cap, powder container, developer supply device, and image forming apparatus'20169,244,379'Powder container and image forming apparatus incorporating same'20168,971,769'Development device including a removable seal to seal a supplied-developer and/or a collected-developer communicating area'20158,965,250'Cap, powder container, developer supply device, and image forming apparatus'20158,934,813'Image-forming apparatus and powder container'20158,886,095'Powder container, powder supply device and image-forming apparatus'20148,750,752'Development device including a removable seal to seal a supplied-developer and/or a collected-developer communicating area'20148,626,037'Powder container having an opening on an end of the container body, the opening facing the longitudinal direction of the container'20148,571,449'Development device, process cartridge, and image forming apparatus'20138,385,787'Image forming apparatus and medium container installed therein'20138,295,742'Powder container, powder supplying device, and image forming apparatus'20128,135,314'Developing device, process cartridge, and image forming apparatus, method of developing latent image'20127,995,954'Developing device and image forming apparatus including same which includes a supply path and a recovery path'20117,099,611'Method and apparatus for image forming capable of reducing mechanical stresses to developers during transportation for development'20066,978,109'Image forming apparatus'20056,901,233'Image forming apparatus'20056,823,163'Image forming apparatus including an electric field having an oscillation component between an image carrier and a developer carrier'20046,819,892'Electrophotographic image forming apparatus including air conditioning means for removing harmful substances'20046,819,901'Developing method and a developing device for image forming apparatus'20046,792,234'Developing device having a developer carrier including main and auxiliary magnetic poles and image forming apparatus using the same'20046,782,225'Image forming apparatus having plurality of developing sections with particular magnetic flux density'20046,778,805'Image forming apparatus having a developing device with a magnet brush'20046,757,509'Image forming apparatus'20046,757,511'Image forming apparatus and method using a magnetic toner brush'20046,721,516'Image forming apparatus'20046,701,114'Image forming apparatus and image forming process unit with developer carried on a developer carrier'20046,671,484'Image forming apparatus having developing device with magnet roller with particular magnetic flux density'20036,658,227'Development method apparatus, image formation and process cartridge for suppressing variation in toner charge'20036,597,885'Image forming apparatus having a developing device with a magnet brush'20036,597,884'Image forming apparatus including electrostatic conveyance of charged toner'20036,505,014'Image forming apparatus and an image forming process unit'20036,456,806'Developing method, device, and image forming apparatus with magnet brush'20026,449,452'Method and apparatus for image developing capable of using developer in a magnet brush form'20026,442,364'Image forming apparatus having a developer carrier capable of preventing toner adhesion'20026,385,423'Image forming apparatus and developing device therefor capable of increasing image density of a low contrast image'20026,366,751'Image forming apparatus including preselected range between charge injection layer and voltage potential'20026,125,243'Toner replenishing and developer replacing device for a developing unit of an image forming apparatus'20006,081,684'Method and apparatus for image forming capable of performing an improved circulation of developer'2000RE036301'Image forming apparatus having rotatable electrophotographic process unit'19995,915,155'Toner replenishing and developer replacing device for a developing unit of an image forming apparatus'19995,774,772'Toner cartridge having a toner stirring member'19985,638,159'Developing unit for an image forming apparatus and method of collecting bicomponent developer therefrom'19975,619,316'Image forming apparatus'19975,606,408'Image forming apparatus and cleaning device therefor'19975,598,254'Cartridge for replenishing two-ingredient developer to an image forming apparatus and a replenishing device using the same'19975,555,469'Image forming apparatus having toner recycling device with electrostatic conveyor'19965,442,430'Color image forming apparatus and cleaning device therefor'19955,416,568'Developing unit for an image forming apparatus'19955,367,363'Image forming apparatus having rotatable electrophotographic process unit'19945,323,214'Image forming apparatus having an electrostatic actuator'19945,255,059'Image forming apparatus'19935,235,384'Image forming apparatus with replaceable process units'19935,109,254'Developing apparatus'1992

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1992–2006Patents assigned to RICOH KK (40)· patent assignee history
1992–2019Based in Fujisawa, JP· patent location history
2002–2019Based in Kanagawa, JP· patent location history
2003Based in Kawasaki, JP· patent location history
2003Based in Tokyo, JP· patent location history
2011–2019Patents assigned to RICOH CO LTD (21)· patent assignee history
2012–2019Patents assigned to KAI TSUKURU (18)· patent assignee history
2012–2019Patents assigned to HOSOKAWA HIROSHI (16)· patent assignee history
2012–2019Patents assigned to HAYAKAWA TADASHI (14)· patent assignee history
2021Based in Koshi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
RICOH KK401992–2006
RICOH CO LTD212011–2019
KAI TSUKURUself182012–2019
HOSOKAWA HIROSHI162012–2019
HAYAKAWA TADASHI142012–2019
Locations
LocationPatentsSpan
Kanagawa, JP302002–2019
Fujisawa, JP291992–2019
Koshi, JP12021
Kawasaki, JP12003
Tokyo, JP12003