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For the Inventor, By the Inventor

Hiroshima, Japan

Akinori Yamashita

This inventor holds 7 USPTO granted patents. Top assignee: Mazda Motor Corporation. Active years: 1987-1991.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Akinori Yamashita. Retrieved from https://idiyas.com/inventor/akinori-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 = 7

% Patents Active = 100.0

Average Co-Inventor Count = 4.2

ph-index = 6

Forward Citations = 91(Granted Patents)


Company Filing History:

goldMedal7 out of 4,753 
 
Mazda Motor Corporation
 patents

Years Active: 1987-1991

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7 patents (USPTO):Explore Patents
1. 4996966 - Supercharged engine (1991-03-05),
2. 4889082 - Intake system for multiple-cylinder engine (1989-12-26),
3. 4846117 - Intake system for multiple-cylinder engine (1989-07-11),
4. 4811231 - Apparatus for controlling fuel injection and swirl motion of air in (1989-03-07),
5. 4714063 - Intake system for internal combustion engine (1987-12-22),
6. 4658792 - Fuel injection system for internal combustion engine (1987-04-21),
7. 4656988 - Automobile fuel supply control (1987-04-14),

Title: Akinori Yamashita: Innovator in Engine Technology

Introduction

Akinori Yamashita is a prominent inventor based in Hiroshima, Japan. He has made significant contributions to the field of engine technology, holding a total of 7 patents. His innovative designs focus on enhancing engine performance and efficiency.

Latest Patents

One of his latest patents is for a supercharged engine. This engine features a mechanical supercharger located in the intake passage, driven by the engine's output power. The supercharger can be connected or disconnected from the engine's output power via a clutch. The engine is equipped with intake and exhaust valves that operate with an overlap time, which can be adjusted by a valve timing changing mechanism. This mechanism optimizes the air intake based on the engine's operational conditions.

Another notable patent is for an intake system designed for multiple-cylinder engines. This system includes first and second branch passages, along with discrete intake passages that connect the cylinders to these branches. The design incorporates a circular passage that utilizes the resonance tuning effect of intake air to supercharge the engine. Additionally, the system features a cross-sectional area changing mechanism that adjusts the effective area of the downstream side communicating passage according to engine speed.

Career Highlights

Akinori Yamashita is currently employed at Mazda Motor Corporation, where he continues to innovate and develop advanced engine technologies. His work has significantly impacted the automotive industry, particularly in enhancing engine performance and efficiency.

Collaborations

Yamashita has collaborated with notable coworkers, including Masanori Misumi and Noboru Hashimoto. Their combined expertise has contributed to the successful development of innovative engine technologies.

Conclusion

Akinori Yamashita is a key figure in the field of engine technology, with a focus on supercharging and intake systems. His contributions through his patents and work at Mazda Motor Corporation have paved the way for advancements in automotive engineering.

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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