Seizi Yamashita

This inventor holds 15 USPTO granted patents, primarily in Electric Motor Technology. Top assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.. Active years: 1977-1992.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Seizi Yamashita. Retrieved from https://idiyas.com/inventor/seizi-yamashita

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

Calculating rank

USPTO Granted Patents = 15

% Patents Active = 100.0

Average Co-Inventor Count = 4.0

ph-index = 11

Forward Citations = 372(Granted Patents)

Location History:

Hitachi, JA (1977)
Katsuta, JP (1979 - 1992)

Company Filing History:

Hitachi Automotive Engineering Co., Ltd.

patents

where one patent can have more than one assignee

Years Active: 1977-1992

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Areas of Expertise:

Electric Motor Actuator

Power Steering Control

Torque Detection

Stepping Motor

Position Detection

Linear Motor

Induction Motor

Permanent Magnet Rotor

Brushless Motor

Synchronous Motor

Cooling Device

Rotary Machine

15 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5101148 - Electric motor actuator (1992-03-31),

2. 4875539 - Electric power steering control system (1989-10-24),

3. 4874053 - Torque detecting apparatus (1989-10-17),

4. 4857786 - Structure of stepping motor and method of driving the stepping motor (1989-08-15),

5. 4818939 - Apparatus for magnetically detecting position or speed or moving body (1989-04-04),

6. 4678971 - Linear motor and control method thereof (1987-07-07),

7. 4454438 - Synchronized induction motor (1984-06-12),

8. 4451752 - Stator of D.C. rotary machine (1984-05-29),

9. 4409506 - Induction motor (1983-10-11),

10. 4403161 - Permanent magnet rotor (1983-09-06),

11. 4341971 - Armature of electric rotating machine (1982-07-27),

12. 4336475 - Slotless brushless motor (1982-06-22),

13. 4166235 - Magnetron comprising ferromagnetic material members axially magnetized (1979-08-28),

14. 4144469 - Stress protection for permanent magnet type synchronous motor (1979-03-13),

15. 4039871 - Cooling device for use in a low inertia electric motor (1977-08-02),

Title: Seizi Yamashita: Pioneering Inventor from Katsuta

Introduction: Seizi Yamashita is a renowned inventor hailing from Katsuta, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Seizi Yamashita holds several patents in various technological domains, showcasing his continuous commitment to pushing the boundaries of innovation.

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

Collaborations: Seizi Yamashita has collaborated with leading research institutions, universities, and companies worldwide, fostering a culture of innovation and knowledge sharing.

Conclusion: Seizi Yamashita's passion for innovation and his relentless pursuit of excellence have solidified his position as a trailblazer in the world of inventions, inspiring future generations to push the limits of what is possible.

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]