LexDanaLexDanabeta
Inventor

Yuji Kumagai

Inventor
Yamatokoriyama, JP

Overview

14→
Patents
1980–2018
Patent span
Electricity
Primary field (CPC H)

Patents· 14 as inventor

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

G03Gprimary
G03GElectrography22%
H02KDynamo-electric machines11%
H01LSemiconductor devices7%
H05BElectric heating7%
H10DInorganic electric semiconductor devices7%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h107%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h107%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%
B41JTypewriters4%
E02BHydraulic engineering4%
PatentTitleYear
10,164,058Semiconductor device and method of manufacturing semiconductor device20189,842,912'Semiconductor device and method of manufacturing semiconductor device'20179,658,588'Image forming apparatus, image adjustment method for the image forming apparatus, and adjustment pattern image'20179,024,989'Registration adjustment method for image forming apparatus and image forming apparatus'20158,121,530'Image forming method and image forming apparatus'20127,957,688'Image forming method and image forming apparatus'20117,660,547'Charging device'20107,526,217'Image forming apparatus and waste toner warning method'20097,456,533'Motor and electric apparatus equipped with a conductive pin for suppressing electrolytic corrosion'20087,339,329'Dimmable ballast for an electrodeless discharge lamp'20085,945,785'Power source device with minimized variation in circuit efficiency due to variation in applied voltage to driving transformer'19995,388,928'Flexible membraneous weir'19954,563,606'Electric rotary machine with toroidal windings on an annular stator core'19864,217,514'Stator structure for induction motor'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–1986Patents assigned to HITACHI LTD (2)· patent assignee history
1999–2008Patents assigned to MATSUSHITA ELECTRIC WORKS LTD (2)· patent assignee history
1999Based in Kadoma, JP· patent location history
2008–2017Based in Osaka, JP· patent location history
2008Based in Sabae, JP· patent location history
2009–2017Patents assigned to SHARP KK (6)· patent assignee history
2009–2012Based in Yamatokoriyama, JP· patent location history
2012–2015Patents assigned to KUMAGAI YUJI (2)· patent assignee history
2017–2018Patents assigned to FUJI ELECTRIC CO LTD (2)· patent assignee history
2017–2018Based in Matsumoto, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SHARP KK62009–2017
FUJI ELECTRIC CO LTD22017–2018
HITACHI LTD21980–1986
KUMAGAI YUJIself22012–2015
MATSUSHITA ELECTRIC WORKS LTD21999–2008
Locations
LocationPatentsSpan
Yamatokoriyama, JP42009–2012
Osaka, JP32008–2017
Matsumoto, JP22017–2018
Sabae, JP12008
Kadoma, JP11999