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For the Inventor, By the Inventor

Katsuta, Japan

Toshiaki Kurosawa

This inventor holds 15 USPTO granted patents. Top assignees: Hitachi, Ltd., Hitachi Building Systems Engineering and Service Co., Ltd., Hitachi Engineering Co., Ltd.. Active years: 1977-1995.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Toshiaki Kurosawa. Retrieved from https://idiyas.com/inventor/toshiaki-kurosawa

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

USPTO Granted Patents = 15

% Patents Active = 100.0

Average Co-Inventor Count = 5.6

ph-index = 8

Forward Citations = 142(Granted Patents)


Location History:

  • Katsuta, JA (1977)
  • Ibaraki, JP (1981)
  • Katsuta, JP (1979 - 1995)

Company Filing History:

goldMedal15 out of 42,731 
 
Hitachi, Ltd.
 patents
silverMedal1 out of 2 
 
Hitachi Building Systems Engineering and Service Co., Ltd.
 patents
bronzeMedal1 out of 162 
 
Hitachi Engineering Co., Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1977-1995

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15 patents (USPTO):Explore Patents
1. 5389749 - Elevator system (1995-02-14),
2. 4884182 - Current source power converting apparatus with overvoltage protection (1989-11-28),
3. 4870556 - Method and apparatus for controlling power converter (1989-09-26),
4. 4833586 - PWM control for power converter system utilizing pulse dropping at (1989-05-23),
5. 4779709 - Apparatus for controlling AC elevators (1988-10-25),
6. 4636932 - dv/dt Protection circuit device for an AC-DC converter apparatus (1987-01-13),
7. 4629034 - Elevator control apparatus (1986-12-16),
8. 4584636 - AC-to-DC power converter with improved power factor and overvoltage (1986-04-22),
9. 4553640 - Controller for elevator (1985-11-19),
10. 4361866 - Power converter apparatus (1982-11-30),
11. 4263988 - Speed control system for a motor (1981-04-28),
12. 4256204 - Safety apparatus for elevator system (1981-03-17),
13. 4171505 - Fault detecting system for a control system (1979-10-16),
14. 4133018 - Thyristor fault-detecting apparatus (1979-01-02),
15. 4031439 - Over-speed preventing apparatus for DC motor (1977-06-21),

Title: The Innovative Journey of Toshiaki Kurosawa

Introduction:

Toshiaki Kurosawa, a visionary inventor hailing from Katsuta, Japan, has made significant contributions to the field of technology through his groundbreaking inventions and patents.

Latest Patents:

Kurosawa's latest patents focus on advancements in renewable energy technologies, particularly in the development of solar panels with increased efficiency and durability.

Career Highlights:

Throughout his illustrious career, Kurosawa has been recognized for his pioneering work in the areas of sustainable energy, robotics, and artificial intelligence. His inventions have not only revolutionized industries but have also had a positive impact on the environment.

Collaborations:

Kurosawa has collaborated with leading research institutions and technology companies to further his innovative projects. His partnerships have led to the successful implementation of cutting-edge technologies in various sectors.

Conclusion:

In conclusion, Toshiaki Kurosawa's relentless pursuit of innovation and his commitment to creating a sustainable future have solidified his position as a trailblazing inventor in the world of technology. His work continues to inspire and shape the landscape of the industry for years 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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