Inventor

Fumio Tajima

Inventor

Suwa, JP

Overview

1987–2020

Patent span

Electricity

Primary field (CPC H)

Patents· 87 as inventor

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

H02Kprimary

H02KDynamo-electric machines38%

Y02TClimate change mitigation technologies related to transportation20%

B60LPropulsion of electrically-propelled vehicles13%

H02PControl or regulation of electric motors, electric generators or dynamo-electric converters4%

B60KArrangement or mounting of propulsion units or of transmissions in vehicles3%

G11BInformation storage based on relative movement between record carrier and transducer2%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests2%

F02DControlling combustion engines2%

Y10TTechnical subjects covered by former us classification2%

F04DNon-positive-displacement pumps1%

PatentTitleYear

10,525,647Servo press machine, motor using servo press machine, and method of assembling and detaching motor2020 9,853,509Composite torque rotating electric machine2017 9,806,571'Composite torque rotating electric machine'2017 9,511,371'Grinding type vertical grain polishing machine'2016 9,088,193'Motor exciting device and motor exciting method and motor control device and motor control method'2015 RE044037'Rotating electric machine having rotor embedded-permanent-magnets with inner-end magnetic gaps and outer-end magnetic gaps, and electric car using the same electric machine'2013 8,198,775'Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine'2012 8,067,871'Permanent magnet rotating electric machine and electric car using the same'2011 8,040,010'Permanent magnet type generator and hybrid vehicle using the same'2011 7,956,506'Driving apparatus'2011 7,956,509'Electric pump'2011 7,851,959'Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine'2010 7,847,462'Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine'2010 7,808,144'Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine'2010 7,777,389'Rotating electrical machine'2010 7,768,158'Cylindrical linear motor and a vehicle using the same'2010 7,750,529'Electric Pump'2010 7,714,466'Claw-teeth-type rotating electrical machine'2010 7,671,502'Driving apparatus'2010 7,667,365'Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine'2010 7,521,832'Rotating electric machine having rotor embedded-permanent-magnets with inner-end magnetic gaps and outer-end magnetic gaps, and electric car using the same electric machine'2009 7,518,277'Electric motor'2009 7,446,448'Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine'2008 RE040523'Non-contact rotational position sensor and throttle valve assembly including non-contact rotational position sensor'2008 7,425,786'Permanent magnet type rotating electrical machine'2008 7,417,349'Driving apparatus'2008 7,417,346'Permanent magnet rotating electric machine'2008 7,378,773'Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine'2008 7,233,089'Permanent magnet rotating electric machine'2007 7,215,055'Vehicle'2007 7,196,447'Rotating electric machine'2007 7,151,335'Permanent magnet rotating electric machine and electric car using the same'2006 7,148,597'Permanent magnet rotating electric machine'2006 7,122,934'Rotating electric machine, motor-driven vehicle and resin insert-molding method'2006 7,119,470'Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine'2006 6,963,154'Permanent magnet type electric rotating machine and hybrid electric vehicle using it'2005 6,949,856'Permanent magnet rotating electric machine and electrically driven vehicle employing same'2005 6,876,117'Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine'2005 6,849,983'Rotary machine having bypath magnetic path blocking magnetic barrier'2005 6,822,360'Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine'2004 6,815,858'Permanent magnet rotating electric machine'2004 6,798,103'Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine'2004 6,734,592'Permanent magnet rotating electric machine and electrically driven vehicle employing same'2004 6,661,147'Electric vehicle and rotary electric machine having a divided rotor core'2003 6,559,637'Non-contact rotational position sensor and throttle valve assembly including non-contact rotational position sensor'2003 6,528,920'Permanent magnet rotary machine and electric vehicle using the same'2003 6,481,089'Method for manufacturing an electromotive machine having an insulated coil'2002 6,452,302'Rotary electric machine and electric vehicle using the same'2002 6,445,100'Permanent magnet dynamo electric machine'2002 6,429,565'Permanent magnet type electric rotating machine and hybrid electric vehicle using it'2002 6,404,152'Motor control device'2002 6,396,183'Permanent magnet rotating electric machine and electrically driven vehicle employing same'2002 6,242,837'Permanent magnet rotary machine and electric vehicle using the same'2001 6,239,525'Permanent magnet dynamoelectric rotating machine and electric vehicle equipped with the same'2001 6,229,241'Structure and manufacturing method for motor and stator'2001 6,222,296'Electric motor having a stator with an end core part having a different shape than a central core part'2001 6,211,587'Electric rotating machine'2001 6,208,054'Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine'2001 6,188,157'Parmanent magnet dynamo electric machine'2001 6,133,662'Permanent magnet dynamoelectric rotating machine and electric vehicle equipped with the same'2000 6,037,695'Vehicle alternator having improved rotating yoke'2000 6,034,459'Permanent magnet type dynamo electric machine and electric vehicle using the same'2000 6,034,460'Permanent magnet rotating electric machine and electrically driven vehicle employing same'2000 5,990,657'Inverter system and control system for electric vehicle'1999 5,936,323'Permanent magnet rotation type rotary machine and manufacturing method thereof'1999 5,812,433'Electromagnetic driving system for controlling electromagnetic driving device by simulator'1998 5,811,904'Permanent magnet dynamo electric machine'1998 5,744,880'Rotating motor and motor-driven vehicle'1998 5,664,542'Electronic throttle system'1997 5,549,172'Electric vehicle drive system and drive method'1996 5,517,966'Electronic throttle system'1996 5,459,378'CRT display apparatus'1995 5,453,972'Optical disk apparatus'1995 5,432,644'Disk drive unit having motor components in a compact arrangement'1995 5,431,141'Electronic throttle system'1995 5,298,841'Apparatus for controlling the speed of a moving object'1994 5,175,479'Moving body position control apparatus and signal reproducing apparatus'1992 5,038,065'Permanent magnet reversible synchronous motor'1991 5,023,924'Speed control apparatus for movable equipment'1991 4,980,617'Speed control apparatus of movable equipment'1990 4,918,346'Low ripple-torque permanent magnet brushless motor'1990 4,914,361'Method and apparatus for controlling the speed of moving body'1990 4,879,502'Speed control apparatus and method for motors'1989 4,874,053'Torque detecting apparatus'1989 4,756,875'Apparatus for filtering water containing radioactive substances in nuclear power plants'1988 4,672,253'Permanent magnet electrical machine with reduced cogging'1987 4,639,625'Direct-current machine having permanent magnet field system'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–2013Patents assigned to HITACHI LTD (76)· patent assignee history

1989–2003Based in Ibaraki, JP· patent location history

1990–2005Based in Juo, JP· patent location history

1995–1997Patents assigned to HITACHI AUTOMOTIVE ENG (3)· patent assignee history

1996–2010Based in Suwa, JP· patent location history

1998–2012Patents assigned to HITACHI CAR ENG CO LTD (29)· patent assignee history

2001–2012Based in Taga-gun, JP· patent location history

2006–2013Based in Hitachi, JP· patent location history

2011–2017Patents assigned to TAJIMA FUMIO (6)· patent assignee history

2015–2020Patents assigned to AIDA ENG LTD (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	76	1987–2013
HITACHI CAR ENG CO LTD	29	1998–2012
TAJIMA FUMIOself	6	2011–2017
AIDA ENG LTD	4	2015–2020
HITACHI AUTOMOTIVE ENG	3	1995–1997

Locations

Location	Patents	Span
Suwa, JP	20	1996–2010
Taga-gun, JP	18	2001–2012
Ibaraki, JP	18	1989–2003
Hitachi, JP	12	2006–2013
Juo, JP	5	1990–2005