Higashiibaraki, Japan

Osamu Koizumi

This inventor holds 52 USPTO granted patents and 1 EPO patent, primarily in Electric Rotating Machines (CPC class H02K). Top assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd., Hitachi Automotive Engineering Co., Ltd.. Active years: 1977-2012.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Osamu Koizumi. Retrieved from https://idiyas.com/inventor/osamu-koizumi

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


% Patents Active = 57.7


Average Co-Inventor Count = 5.2

ph-index = 16

Forward Citations = 819(Granted Patents)

Forward Citations (Not Self Cited) = 730(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Katsuta, JA (1977)
  • Ibaraki-ken, JP (1998 - 2002)
  • Chiyoda-ku, JP (2006)
  • Hitachinaka, JP (2007)
  • Higashiibaraki, JP (2004 - 2008)
  • Ibarakimachi, JP (1982 - 2010)
  • Ibaraki, JP (2002 - 2011)
  • Higashiibaraki-gun, JP (2002 - 2012)

Company Filing History:


Years Active: 1977-2012

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Areas of Expertise:
Permanent Magnet
Electric Vehicle
Rotating Electric Machine
DC Brushless Motor
Electric Power Steering
Synchronous Motor
Resin-Molded Stator
Motor Control Device
Hybrid Electric Vehicle
Electromotive Machine
Driving Apparatus
Production Method
52 patents (USPTO):Explore Patents

Title: Inventor Osamu Koizumi

Introduction: Osamu Koizumi is a renowned inventor hailing from Higashiibaraki-gun, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Osamu Koizumi holds several patents in various technological domains, showcasing his continuous dedication to pushing the boundaries of innovation.

Career Highlights: Throughout his illustrious career, Osamu Koizumi has been instrumental in developing cutting-edge technologies that have revolutionized industries and improved the lives of many.

Collaborations: Osamu Koizumi has collaborated with leading research institutions, universities, and companies to further advance his inventions and bring them to the market, solidifying his reputation as a visionary inventor.

Conclusion: In conclusion, Osamu Koizumi's passion for innovation and his relentless pursuit of technological advancement have established him as a prominent figure in the world of inventors, leaving a lasting impact on the industry.

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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