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For the Inventor, By the Inventor

Hitachi, Japan

Tsutomu Ohmae

This inventor holds 16 USPTO granted patents, primarily in Electric Vehicle Control. Top assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd., Agency of Industrial Science and Technology. Active years: 1977-1997.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tsutomu Ohmae. Retrieved from https://idiyas.com/inventor/tsutomu-ohmae

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

Calculating rank
USPTO Granted Patents = 16

% Patents Active = 100.0

Average Co-Inventor Count = 4.1

ph-index = 14

Forward Citations = 654(Granted Patents)


Location History:

  • Hitachi, JA (1977)
  • Ibaraki, JP (1980)
  • Hitachi-shi, Ibaraki JP (1995)
  • Hitachi, JP (1979 - 1997)

Company Filing History:

goldMedal13 out of 42,752 
 
Hitachi, Ltd.
 patents
silverMedal3 out of 152 
 
Hitachi Automotive Engineering Co., Ltd.
 patents
bronzeMedal2 out of 1,430 
 
Agency of Industrial Science and Technology
 patents
4. 1 out of 834,659 
Other
 patents
where one patent can have more than one assignee

Years Active: 1977-1997

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Areas of Expertise:
Electric Vehicle
Torque Controller
Regeneration Braking
Drive System
Control Method
Power Steering
Motor Drive
Speed Detection
Automated Gear Control
Transistor Switching
Height Control
Protective Control
16 patents (USPTO):Explore Patents
1. 5650700 - Electric vehicle torque controller (1997-07-22),
2. 5583406 - Control method and system for regeneration braking of an electric vehicle (1996-12-10),
3. 5549172 - Electric vehicle drive system and drive method (1996-08-27),
4. 5481168 - Electric vehicle torque controller (1996-01-02),
5. 5414339 - Electric vehicle control system (1995-05-09),
6. 5355749 - Control apparatus and control method for motor drive vehicle (1994-10-18),
7. 5309073 - Electric vehicle control device (1994-05-03),
8. 4926960 - Electric power steering apparatus for vehicle (1990-05-22),
9. 4875539 - Electric power steering control system (1989-10-24),
10. 4869334 - Electric motor-driven power steering apparatus (1989-09-26),
11. 4865148 - Vehicle height control apparatus responsive to power steering operation (1989-09-12),
12. 4584528 - Speed detecting method and apparatus (1986-04-22),
13. 4500820 - Protective control apparatus for electrical vehicle (1985-02-19),
14. 4218730 - Transistor switching apparatus for use in the control of a D.C. load (1980-08-19),
15. 4174645 - Automatic change-gear control device for use in electromobile (1979-11-20),

Title: Tsutomu Ohmae - The Innovative Mind Behind Hitachi

Introduction: Tsutomu Ohmae is a renowned inventor hailing from Hitachi, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Tsutomu Ohmae holds several patents in the areas of electronics, telecommunications, and computer science, showcasing his continuous dedication to pushing the boundaries of technological advancement.

Career Highlights: With a career spanning several decades, Tsutomu Ohmae has worked extensively in research and development, playing a pivotal role in the creation of cutting-edge technologies that have revolutionized industries worldwide.

Collaborations: Throughout his career, Tsutomu Ohmae has collaborated with leading experts, researchers, and companies in the tech sector, fostering a culture of innovation and knowledge-sharing that has led to numerous breakthroughs.

Conclusion: Tsutomu Ohmae's relentless pursuit of innovation and his passion for pushing the limits of technology have solidified his reputation as a visionary inventor in the global tech community.

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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