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Inventor

Seiki Igarashi

Inventor
Tokyo, JP

Overview

13→
Patents
1993–2020
Patent span
Electricity
Primary field (CPC H)

Patents· 13 as inventor

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

H02Mprimary
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems48%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications16%
H03KPulse technique12%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h108%
H01LSemiconductor devices4%
H02JElectric power networks4%
H10DInorganic electric semiconductor devices4%
Y02PClimate change mitigation technologies in the production or processing of goods4%
PatentTitleYear
10,566,966Semiconductor device and oscillation suppressing device20207,433,212'System linking apparatus for generated electric power'20086,657,873'Switching power supply circuit'20036,459,597'Electric power conversion apparatus with noise reduction device'20026,339,262'Switching power supply using an input DC power supply'20026,288,595'On-delay-compensating arm on-detection circuit'20016,111,762'Switching power supply'20006,108,218'Switching power supply with power factor control'20006,061,253'Variable frequency soft switching power supply with reduced noise and improved power factor'20005,936,387'Gate drive circuit for power converters that reduces surge voltages'19995,889,663'Circuit for balancing steady-state currents of switching devices in electric power converter'19995,616,955'Power transistor module wiring structure'19975,202,619'Control circuit for a switching transistor'1993

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1993–2020Patents assigned to FUJI ELECTRIC CO LTD (11)· patent assignee history
1993–2000Based in Kawasaki, JP· patent location history
1997–2003Based in Tokyo, JP· patent location history
2000Patents assigned to FUJI ELECTRICAL CO LTD (1)· patent assignee history
2008Patents assigned to FUJI ELEC DEVICE TECH CO LTD (1)· patent assignee history
2008Patents assigned to TOKYO INST TECH (1)· patent assignee history
2008–2020Based in Saitama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
FUJI ELECTRIC CO LTD111993–2020
FUJI ELEC DEVICE TECH CO LTD12008
FUJI ELECTRICAL CO LTD12000
TOKYO INST TECH12008
Locations
LocationPatentsSpan
Tokyo, JP91997–2003
Saitama, JP22008–2020
Kawasaki, JP21993–2000