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For the Inventor, By the Inventor

Himeji, Japan

Tetsuo Yagi

This inventor holds 5 USPTO granted patents. Top assignee: Mitsubishi Denki Kabushiki Kaisha. Active years: 1989-1991.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tetsuo Yagi. Retrieved from https://idiyas.com/inventor/tetsuo-yagi

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

USPTO Granted Patents = 5

% Patents Active = 100.0

Average Co-Inventor Count = 2.6

ph-index = 2

Forward Citations = 20(Granted Patents)


Location History:

  • Hyogo, JP (1990)
  • Himeji, JP (1989 - 1991)

Company Filing History:

goldMedal5 out of 21,351 
 
Mitsubishi Denki Kabushiki Kaisha
 patents

Years Active: 1989-1991

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5 patents (USPTO):Explore Patents
1. 5019739 - Dc motor for automotive engine starter (1991-05-28),
2. 4978874 - Coaxial type engine starter with hollow armature shaft (1990-12-18),
3. 4912352 - Armature of electric motor (1990-03-27),
4. 4891996 - Engine starter having planet reduction gear mechanism (1990-01-09),
5. 4871936 - Commutator for a starter motor (1989-10-03),

Title: Tetsuo Yagi: Innovator in Automotive Engineering

Introduction

Tetsuo Yagi is a prominent inventor based in Himeji, Japan. He has made significant contributions to the field of automotive engineering, particularly in the development of innovative starter motors. With a total of 5 patents to his name, Yagi's work has had a lasting impact on automotive technology.

Latest Patents

One of Yagi's latest patents is a DC motor designed for automotive engine starters. This engine starter features a motor with a tubular armature rotation shaft and a rotation output shaft that is axially slidably supported. The design includes a clutch mechanism that transmits torque from the armature rotation shaft to the rotation output shaft. An electromagnetic switch is incorporated, which utilizes a shifting member to push the rotation output shaft in the axial direction using electromagnetic force. This innovative arrangement not only reduces the length of the starter but also effectively prevents dust from entering the contact chamber of the electromagnetic switch. To ensure a compact design, a compact spring is included to restore the rotation shaft to its rest position after the engine has started.

Career Highlights

Tetsuo Yagi is associated with Mitsubishi Denki Kabushiki Kaisha, a leading company in the field of electrical and electronic equipment. His work at Mitsubishi has allowed him to focus on developing advanced technologies that enhance automotive performance and reliability.

Collaborations

Throughout his career, Yagi has collaborated with notable colleagues such as Shuzoo Isozumi and Toshinori Tanaka. These collaborations have contributed to the successful development of various innovative technologies in the automotive sector.

Conclusion

Tetsuo Yagi's contributions to automotive engineering, particularly through his patented inventions, demonstrate his commitment to innovation and excellence. His work continues to influence the industry, paving the way for future advancements in automotive 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]
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