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Inventor

Tomoyuki Utsumi

Inventor
Hitachi, JP

Overview

2→
Patents
2003–2010
Patent span
Electricity
Primary field (CPC H)

Patents· 2 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 systems20%
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters20%
H10DInorganic electric semiconductor devices20%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h1020%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h1020%
PatentTitleYear
7,859,210'Semiconductor device for driving motor, three-phase motor and motor driving apparatus with the semiconductor device and fan motor'20106,580,108'Insulated gate bipolar transistor decreasing the gate resistance'2003

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2003–2010Patents assigned to HITACHI LTD (2)· patent assignee history
2003Patents assigned to HITACHI HARAMACHI ELECTRONICS (1)· patent assignee history
2003–2010Based in Hitachi, JP· patent location history
2010Patents assigned to HITACHI INF & CONTROL SYST (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD22003–2010
HITACHI HARAMACHI ELECTRONICS12003
HITACHI INF & CONTROL SYST12010
Locations
LocationPatentsSpan
Hitachi, JP22003–2010