Inventor

Hiroyuki Fujikawa

Inventor

Yokohama, JP

Overview

1999–2021

Patent span

Physics

Primary field (CPC G)

Patents· 57 as inventor

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

G03Gprimary

G03GElectrography85%

C09DCoating compositions, e.g. paints, varnishes or lacquers3%

C01GCompounds containing metals not covered by subclasses c01d or c01f1%

C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds1%

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds1%

C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds1%

C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients1%

C08LCompositions of macromolecular compounds1%

E06BFixed or movable closures for openings in buildings, vehicles, fences or like enclosures in general, e.g. doors, windows, blinds, gates1%

G01NInvestigating or analysing materials by determining their chemical or physical properties1%

PatentTitleYear

11,131,939Toner2021 10,955,765Magnetic carrier and two-component developer2021 10,935,902Toner2021 10,620,556Toner2020 10,599,060Toner2020 10,564,560Toner2020 10,474,049Toner2019 10,451,986Toner2019 10,423,086Toner2019 10,401,748Toner2019 10,274,851Toner2019 10,197,936Toner2019 10,175,595Toner2019 10,146,146Toner and method of producing toner2018 10,088,773Developer supply kit, developer supplying device and image forming apparatus2018 10,082,743Toner2018 10,048,610Toner and method for manufacturing toner2018 10,036,970Magenta toner2018 9,720,349'Developer supply kit, developer supplying device and image forming apparatus'2017 9,665,026'Toner and two-component developer'2017 9,651,883'Toner'2017 9,594,323'Toner'2017 9,436,112'Toner and two-component developer'2016 9,417,540'Toner and two-component developer'2016 9,348,253'Image-forming method'2016 9,256,148'Toner'2016 9,152,088'Developer replenishing cartridge and developer replenishing method'2015 9,034,549'Toner'2015 8,986,914'Toner'2015 8,455,167'Toner, binary developer, and image forming method'2013 8,288,069'Toner and two-component developer'2012 8,142,972'Developer for replenishment and image forming method'2012 8,137,886'Magnetic carrier, two-component developer and image forming method'2012 7,983,581'Fixing method and fixing device with specified temperature relationships for recording medium'2011 7,939,233'Magnetic carrier and two-component developer'2011 7,927,775'Magnetic carrier and two component developer'2011 7,858,283'Magnetic carrier and two-component developer'2010 7,452,647'Color toner'2008 7,442,478'Toner and method for forming image'2008 7,396,629'Image forming method and image forming apparatus'2008 7,396,626'Toner'2008 7,381,515'Image forming method and image forming apparatus'2008 7,320,850'Magenta toner'2008 7,297,455'Toner, and image forming method'2007 7,288,348'Color toner'2007 7,279,262'Magnetic carrier and two-component developer'2007 7,272,348'Developing method using a developer with a specified degree of compression and shearing stress'2007 7,147,981'Toner'2006 7,147,980'Toner and image forming apparatus'2006 6,670,087'Toner, image-forming apparatus, process cartridge and image forming method'2003 6,653,036'Magnetic toner and image forming method'2003 6,235,441'Positively chargeable toner, image forming method and image forming apparatus'2001 6,203,959'Toner'2001 6,156,471'Toner and image forming method'2000 6,120,961'Toner for developing electrostatic images'2000 6,020,102'Positive-chargeable toner, image forming method and apparatus unit'2000 5,968,701'Toner and image forming method'1999

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1999–2021Patents assigned to CANON KK (57)· patent assignee history

1999–2021Based in Yokohama, JP· patent location history

2000Based in Numazu, JP· patent location history

2003–2008Based in Kanagawa, JP· patent location history

2012–2017Patents assigned to FUJIKAWA HIROYUKI (8)· patent assignee history

2012–2017Patents assigned to ITAKURA TAKAYUKI (8)· patent assignee history

2012–2017Patents assigned to NAKAMURA KUNIHIKO (8)· patent assignee history

2012–2017Patents assigned to KOMATSU NOZOMU (7)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
CANON KK	57	1999–2021
FUJIKAWA HIROYUKIself	8	2012–2017
ITAKURA TAKAYUKI	8	2012–2017
NAKAMURA KUNIHIKO	8	2012–2017
KOMATSU NOZOMU	7	2012–2017

Locations

Location	Patents	Span
Yokohama, JP	46	1999–2021
Kanagawa, JP	9	2003–2008
Numazu, JP	2	2000