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For the Inventor, By the Inventor

Hiroshima, Japan

Akio Matsumoto

This inventor holds 6 USPTO granted patents. Top assignee: Mazda Motor Corporation. Active years: 1991-1997.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Akio Matsumoto. Retrieved from https://idiyas.com/inventor/akio-matsumoto-42vmhimp

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

Calculating rank
USPTO Granted Patents = 6

% Patents Active = 100.0

Average Co-Inventor Count = 2.3

ph-index = 5

Forward Citations = 58(Granted Patents)


Company Filing History:

goldMedal6 out of 4,753 
 
Mazda Motor Corporation
 patents

Years Active: 1991-1997

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6 patents (USPTO):Explore Patents
1. 5647820 - Hydraulic control system of automatic transmission (1997-07-15),
2. 5551931 - Method of and system for gear shift controlling for an automatic (1996-09-03),
3. 5435211 - Control system for torque converter (1995-07-25),
4. 5397284 - Shift control method and system for automatic transmission (1995-03-14),
5. 5046380 - Throttle cable fitting structure (1991-09-10),
6. 5014575 - Control systems for automatic transmissions (1991-05-14),

Title: Akio Matsumoto: Innovator in Automatic Transmission Technology

Introduction

Akio Matsumoto is a prominent inventor based in Hiroshima, Japan. He has made significant contributions to the field of automatic transmission technology, holding a total of 6 patents. His innovative work has greatly influenced the automotive industry, particularly in enhancing the performance and efficiency of automatic transmissions.

Latest Patents

Matsumoto's latest patents include a hydraulic control system for automatic transmissions. This system is designed to control the pressure during shift operations, allowing for the selective engagement and release of frictional elements. It features an inertia phase detecting device that identifies the starting point of the inertia phase during shifts, along with a control pressure reducing device that gradually lowers the pressure to the engaged frictional element after the inertia phase is detected. This innovation effectively reduces torque shock during shift operations. Another notable patent is a method and system for gear shift control in automatic transmissions. This system enables a specific gear shift by simultaneously locking a first frictional element and unlocking a second one, with a delay in the unlocking process to optimize performance.

Career Highlights

Akio Matsumoto is currently employed at Mazda Motor Corporation, where he continues to develop cutting-edge technologies in automotive engineering. His work has been instrumental in advancing the capabilities of automatic transmission systems, making them more efficient and responsive.

Collaborations

Matsumoto has collaborated with notable colleagues such as Junichi Doi and Tomoo Sawazaki. Their combined expertise has contributed to the successful development of innovative solutions in the automotive sector.

Conclusion

Akio Matsumoto's contributions to automatic transmission technology exemplify the impact of innovation in the automotive industry. His patents reflect a commitment to enhancing vehicle performance and driving experience.

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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