Seiya Shima

This inventor holds 20 USPTO granted patents, primarily in Power Conversion Technology. Top assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.. Active years: 1977-1989.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Seiya Shima. Retrieved from https://idiyas.com/inventor/seiya-shima

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

USPTO Granted Patents = 20

% Patents Active = 100.0

Average Co-Inventor Count = 4.8

ph-index = 10

Forward Citations = 204(Granted Patents)

Location History:

Katsuta, JA (1977)
Ibaraki, JP (1981)
Katsuta, JP (1978 - 1989)

Company Filing History:

Hitachi Engineering Co., Ltd.

patents

where one patent can have more than one assignee

Years Active: 1977-1989

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Areas of Expertise:

Power Converter

PWM Control

Elevator Control

Reactive Power Compensation

AC-DC Converter

Motor Speed Control

Current-Source Apparatus

Fault Detection

Thyristor Control

Position Detection

Current Transducer

Safety Apparatus

20 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4870556 - Method and apparatus for controlling power converter (1989-09-26),

2. 4833586 - PWM control for power converter system utilizing pulse dropping at (1989-05-23),

3. 4829416 - Apparatus for controlling power transducers of the pulse width (1989-05-09),

4. 4780660 - Apparatus for compensating reactive power by current-source type (1988-10-25),

5. 4779709 - Apparatus for controlling AC elevators (1988-10-25),

6. 4672520 - Current-source power converting apparatus with self-extinction devices (1987-06-09),

7. 4636932 - dv/dt Protection circuit device for an AC-DC converter apparatus (1987-01-13),

8. 4553640 - Controller for elevator (1985-11-19),

9. 4499986 - Control apparatus for passenger conveyor (1985-02-19),

10. 4441584 - AC Elevator control system (1984-04-10),

11. 4387436 - Method and apparatus for detecting elevator car position (1983-06-07),

12. 4361866 - Power converter apparatus (1982-11-30),

13. 4263988 - Speed control system for a motor (1981-04-28),

14. 4256204 - Safety apparatus for elevator system (1981-03-17),

15. 4245293 - Power converter system (1981-01-13),

Title: The Innovative Journey of Seiya Shima

Introduction: Seiya Shima, a pioneering inventor hailing from Katsuta, Japan, has made significant contributions to the world of technology through his groundbreaking innovations.

Latest Patents: Seiya Shima's recent patents focus on advancements in renewable energy technologies, particularly in the field of solar power generation and energy storage systems.

Career Highlights: With a career spanning over two decades, Seiya Shima has established himself as a leading figure in the renewable energy sector. His work has led to the development of more efficient and sustainable solutions for harnessing solar energy.

Collaborations: Throughout his career, Seiya Shima has collaborated with top research institutions and leading tech companies to further his research and bring his inventions to the market. His partnerships have been instrumental in driving innovation in the renewable energy industry.

Conclusion: Seiya Shima's relentless pursuit of innovation and his dedication to creating a more sustainable future have solidified his reputation as a visionary inventor in the field of renewable energy. His contributions continue to inspire the next generation of inventors and shape the future of clean energy technology.

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]