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For the Inventor, By the Inventor

Taga-gun, Japan

Fumio Tajima

This inventor holds 85 USPTO granted patents and 5 EPO patents, primarily in Electric Machines (CPC class H02K2-112). Top assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd., Aida Engineering, Ltd.. Active years: 1987-2020.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Fumio Tajima. Retrieved from https://idiyas.com/inventor/fumio-tajima

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 85

% Patents Active = 76.5


Average Co-Inventor Count = 5.7

ph-index = 22

Forward Citations = 1,434(Granted Patents)

Forward Citations (Not Self Cited) = 1,308(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Jyuo, JP (1987)
  • Jyuoh, JP (1987)
  • Jyuou, JP (1990)
  • Ibaraki, JP (1989 - 1996)
  • Juuou-machi, JP (1999)
  • Jyuou-machi, JP (1998 - 2001)
  • Juo-machi, JP (1999 - 2002)
  • Ibaraki-ken, JP (1997 - 2003)
  • Jyuo-machi, JP (2002 - 2003)
  • Juo, JP (1990 - 2005)
  • Chiyoda-ku, JP (2006)
  • Juou, JP (2004 - 2008)
  • Juou-machi, JP (1996 - 2010)
  • Taga-gun, JP (2001 - 2012)
  • Hitachi, JP (2006 - 2013)
  • Sagamihara, JP (2015 - 2020)

Company Filing History:

goldMedal71 out of 42,740 
 
Hitachi, Ltd.
 patents
silverMedal20 out of 248 
 
Hitachi Car Engineering Co., Ltd.
 patents
bronzeMedal4 out of 187 
 
Aida Engineering, Ltd.
 patents
4. 3 out of 152 
 
Hitachi Automotive Engineering Co., Ltd.
 patents
5. 2 out of 498 
 
Hitachi Industrial Equipment Systems Co., Ltd.
 patents
6. 2 out of 152 
 
Japan Servo Co.,ltd.
 patents
7. 1 out of 162 
 
Hitachi Engineering Co., Ltd.
 patents
8. 1 out of 2,333 
 
Hitachi Metals, Ltd.
 patents
9. 1 out of 149 
 
Hitachi Powdered Metals Co., Ltd.
 patents
10. 1 out of 6 
 
Hitachi Taga Engineering, Ltd.
 patents
11. 1 out of 13,420 
 
Nissan Motor Company Limited
 patents
12. 9 out of 834,570 
Other
 patents
where one patent can have more than one assignee

Years Active: 1987-2020

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Areas of Expertise:
Permanent Magnet
Electric Rotating Machine
Motor Control
Hybrid Vehicle
Electric Car
Servo Press Machine
Torque Rotating Machine
Non-Contact Sensor
Cylindrical Linear Motor
Electric Pump
Driving Apparatus
Resin Insert-Molding
85 patents (USPTO):Explore Patents
1. 10525647 - Servo press machine, motor using servo press machine, and method of assembling and detaching motor (2020-01-07),
2. 9853509 - Composite torque rotating electric machine (2017-12-26),
3. 9806571 - Composite torque rotating electric machine (2017-10-31),
4. 9088193 - Motor exciting device and motor exciting method and motor control device and motor control method (2015-07-21),
5. RE44037 - 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 (2013-03-04),
6. 8198775 - Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine (2012-06-12),
7. 8067871 - Permanent magnet rotating electric machine and electric car using the same (2011-11-29),
8. 8040010 - Permanent magnet type generator and hybrid vehicle using the same (2011-10-18),
9. 7956509 - Electric pump (2011-06-07),
10. 7956506 - Driving apparatus (2011-06-07),
11. 7851959 - Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine (2010-12-14),
12. 7847462 - Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine (2010-12-07),
13. 7808144 - Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine (2010-10-05),
14. 7777389 - Rotating electrical machine (2010-08-17),
15. 7768158 - Cylindrical linear motor and a vehicle using the same (2010-08-03),

Title: The Innovative Journey of Fumio Tajima

Introduction:

Fumio Tajima, a pioneering inventor hailing from Taga-gun, Japan, has made significant contributions to the world of technology through his groundbreaking innovations.

Latest Patents:

Tajima's latest patents focus on advancements in renewable energy technologies, particularly in the field of solar power generation and energy storage solutions.

Career Highlights:

With a career spanning over three decades, Tajima has established himself as a leading figure in the renewable energy sector. His work has not only revolutionized the way we harness energy but has also paved the way for a more sustainable future.

Collaborations:

Throughout his career, Tajima has collaborated with top research institutions and leading tech companies to further develop and commercialize his inventions. His collaborative efforts have led to the successful implementation of his technologies on a global scale.

Conclusion:

In conclusion, Fumio Tajima's relentless pursuit of innovation and sustainability has left an indelible mark on the world. His inventions continue to shape the future of renewable energy and inspire generations of inventors to come.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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