Inventor

Hironari Kawazoe

Inventor

Hitachi, JP

Overview

7→

Patents

1994–2016

Patent span

Electricity

Primary field (CPC H)

Patents· 7 as inventor

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

Y02Eprimary

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution25%

H02JElectric power networks21%

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 systems21%

H02PControl or regulation of electric motors, electric generators or dynamo-electric converters17%

F03DWind motors4%

F05BIndexing scheme relating to wind, spring, weight, inertia or like motors, to machines or engines for liquids covered by subclasses f03b, f03d and f03g4%

G01RMeasuring electric variables4%

H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy4%

PatentTitleYear

9,344,020'Power conversion apparatus and electrical-mechanical energy conversion system'2016 7,863,904'Cell voltage detection device and cell system using the same'2011 7,855,467'Hybrid power generation of wind-power generator and battery energy storage system'2010 6,731,522'Power generation apparatus using permanent-magnet generator'2004 6,611,438'Power generation apparatus using permanent-magnet generator'2003 6,611,437'Power generation apparatus using permanent-magnet generator'2003 5,349,522'Method and apparatus for controlling the output voltage of an AC electrical system'1994

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1994–2016Patents assigned to HITACHI LTD (6)· patent assignee history

1994Patents assigned to TOKYO ELECTRIC POWER CO (1)· patent assignee history

1994–2011Based in Hitachi, JP· patent location history

2003–2004Based in Chiyoda-ku, JP· patent location history

2010Patents assigned to HITACHI IND EQUIPMENT SYS (1)· patent assignee history

2016Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	6	1994–2016
HITACHI IND EQUIPMENT SYS	1	2010
TOKYO ELECTRIC POWER CO	1	1994

Locations

Location	Patents	Span
Hitachi, JP	3	1994–2011
Chiyoda-ku, JP	3	2003–2004
Tokyo, JP	1	2016