Inventor

Seiji Ishida

Inventor

Hitachinaka, JP

Overview

36→

Patents

1991–2019

Patent span

Performing operations

Primary field (CPC B)

Patents· 36 as inventor

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

E02Fprimary

E02FDredging10%

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 systems10%

Y02TClimate change mitigation technologies related to transportation10%

B60LPropulsion of electrically-propelled vehicles7%

B60KArrangement or mounting of propulsion units or of transmissions in vehicles6%

F02DControlling combustion engines6%

H02PControl or regulation of electric motors, electric generators or dynamo-electric converters6%

B60WConjoint control of vehicle sub-units of different type or different function6%

B60YIndexing scheme relating to aspects cross-cutting vehicle technology5%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%

PatentTitleYear

10,450,723Hybrid construction machinery2019 10,150,465Hybrid construction machine2018 10,060,095Hybrid work machine2018 10,047,501Control device of construction machine2018 9,617,715'Construction machine'2017 9,431,879'Generator motor and electric vehicle using same'2016 9,421,873'Construction machine'2016 9,399,856'Hydraulic working machine'2016 9,108,645'Driving system for railroad vehicle'2015 9,065,361'Hybrid construction machine'2015 9,020,707'Construction machine having swing body'2015 8,950,180'Hybrid construction machine'2015 8,924,100'Hybrid construction machine'2014 7,920,395'Pulse width modulation method for a power converter'2011 7,570,085'Gate driver circuit for switching device'2009 7,433,403'Pulse width modulation method for a power converter'2008 6,704,212'PWM inverter with long carrier wave insertion'2004 6,657,412'Pulse width modulation method, pulse width modulator and power converter'2003 6,642,689'Control apparatus for power converter'2003 6,611,124'Control apparatus of induction motor'2003 6,556,460'Method for controlling a vehicle provided with an electric power converter'2003 6,556,464'PWM converter system'2003 6,496,397'Inverter device'2002 6,262,294'Process for continuously producing monomer components from aromatic polyester'2001 6,214,461'Modified hydrophobic textile product'2001 6,173,762'Heat exchanger tube for falling film evaporator'2001 6,147,470'Device for controlling induction motor and method of controlling the same'2000 6,058,036'Inverter apparatus having operation specifications determined by type of I/O block which is connected to basic control unit'2000 5,631,819'Power converter'1997 5,590,711'Heat transfer tube for absorber'1997 5,574,352'Frequency control method for inverter and apparatus therefor'1996 5,445,682'Method of applying surface hydrophilic treatment to heat-transfer tube'1995 5,300,872'Method and apparatus for control of inverter'1994 5,095,878'Air/fuel ratio control system for internal combustion engine'1992 5,077,971'Air/fuel ratio control system for an internal combustion engine'1992 5,000,843'Culture fluid concentrator'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1992Based in Kyoto, JP· patent location history

1994–2015Patents assigned to HITACHI LTD (16)· patent assignee history

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

1995–2017Based in Tokyo, JP· patent location history

1997–2000Based in Funabashi, JP· patent location history

2009–2018Based in Hitachinaka, JP· patent location history

2014–2016Patents assigned to ISHIDA SEIJI (8)· patent assignee history

2014–2016Patents assigned to KAJITA YUSUKE (5)· patent assignee history

2015–2016Patents assigned to EDAMURA MANABU (4)· patent assignee history

2016–2019Patents assigned to HITACHI CONSTRUCTION MACH CO (8)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	16	1994–2015
HITACHI CONSTRUCTION MACH CO	8	2016–2019
ISHIDA SEIJIself	8	2014–2016
KAJITA YUSUKE	5	2014–2016
EDAMURA MANABU	4	2015–2016

Locations

Location	Patents	Span
Hitachinaka, JP	12	2009–2018
Hitachi, JP	12	1994–2011
Tokyo, JP	3	1995–2017
Funabashi, JP	2	1997–2000
Kyoto, JP	2	1992