Shigemichi Yamada

This inventor holds 11 USPTO granted patents. Top assignees: Toyota Jidosha Kabushiki Kaisha, Toyota Jidosha Kogyo Kabushiki Kaisha. Active years: 1979-1986.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shigemichi Yamada. Retrieved from https://idiyas.com/inventor/shigemichi-yamada

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

USPTO Granted Patents = 11

% Patents Active = 100.0

Average Co-Inventor Count = 2.9

ph-index = 8

Forward Citations = 191(Granted Patents)

Location History:

Nishio, JP (1979)
Hoi, JP (1981)
Aichi, JP (1982)
Toyota, JP (1985 - 1986)

Company Filing History:

9 out of 38,837

Toyota Jidosha Kabushiki Kaisha

patents

2 out of 1,838

Toyota Jidosha Kogyo Kabushiki Kaisha

patents

Years Active: 1979-1986

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11 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4622866 - Transmission and transmission control device for providing downshifting (1986-11-18),

2. 4616521 - Transmission control method providing overlapped engagement of power (1986-10-14),

3. 4603596 - Actuation system for transmission synchronizer providing regulated (1986-08-05),

4. 4594908 - Transmission with two parallel driving shafts bearing two driving gears (1986-06-17),

5. 4589532 - Speed selection means for vehicle transmission system providing either (1986-05-20),

6. 4576063 - Transmission mechanism with parallel transmission systems including one (1986-03-18),

7. 4566348 - Transmission with driven shaft and two clutching devices at the same (1986-01-28),

8. 4548101 - Transmission mechanism with parallel transmission systems including (1985-10-22),

9. 4319497 - Device for turning over a clutch pedal (1982-03-16),

10. 4281753 - Vibration damping device for a mechanical clutch release system for a (1981-08-04),

11. 4139085 - Dry disc-type clutch (1979-02-13),

Title: Shigemichi Yamada: Innovator in Vehicle Transmission Technology

Introduction

Shigemichi Yamada is a prominent inventor based in Toyota, Japan. He has made significant contributions to the field of vehicle transmission technology, holding a total of 11 patents. His innovative methods and devices have advanced the efficiency and performance of vehicle transmission systems.

Latest Patents

Yamada's latest patents include a transmission and transmission control device designed for providing downshifting. This method involves controlling a vehicle transmission mechanism that incorporates several selectively engageable power transmission systems. Each system is individually connectable between a first member and a second member for transmitting rotational power. The clutching mechanisms can be selectively controlled to either freewheel in both rotational directions or provide direct transmission of rotational power in one direction only. This innovative approach allows for smooth downshifting by disengaging the first power transmission system and engaging the second when a downshift is required. Another notable patent is a transmission control method that provides overlapped engagement of power, ensuring smooth and snappy speed stage shifting.

Career Highlights

Throughout his career, Shigemichi Yamada has worked with notable companies such as Toyota Motor Corporation and Toyota Jidosha Kogyo Kabushiki Kaisha. His work has been instrumental in developing advanced transmission technologies that enhance vehicle performance and reliability.

Collaborations

Yamada has collaborated with esteemed colleagues, including Hiroshi Ito and Teruo Akashi. Their combined expertise has contributed to the successful development of innovative transmission solutions.

Conclusion

Shigemichi Yamada's contributions to vehicle transmission technology have established him as a leading inventor in the automotive industry. His innovative patents and collaborative efforts continue to influence the future of vehicle performance and efficiency.

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]