Hiroshima, Japan

Masahisa Yamakawa

This inventor holds 40 USPTO granted patents and 24 EPO patents, primarily in Engine Control Systems. Top assignees: Mazda Motor Corporation, Denso Corporation, Mazda Motor Corporat Ion. Active years: 2005-2023.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masahisa Yamakawa. Retrieved from https://idiyas.com/inventor/masahisa-yamakawa

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


% Patents Active = 70.0

 

Average Co-Inventor Count = 4.9

ph-index = 9

Forward Citations = 210(Granted Patents)


Location History:

  • Fuchu-cho, JP (2005 - 2010)
  • Hiroshima, JP (2010 - 2021)
  • Aki-gun, JP (2021 - 2023)

Company Filing History:


Years Active: 2005-2023

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Areas of Expertise:
Engine Control
Compression Ignition
Spark-Ignition
Direct Injection
Fuel Injection
Supercharged Engines
Internal Combustion
Control Device
Gasoline Engine
Control Method
Laser Ignition
Engine System
40 patents (USPTO):Explore Patents

Title: **Masahisa Yamakawa: Innovator in Engine Control Systems**

Introduction

Masahisa Yamakawa is a prominent inventor based in Hiroshima, Japan, known for his significant contributions to the field of engine control technology. With a remarkable portfolio of 40 patents, Yamakawa's innovations have greatly influenced automotive engineering, particularly in engine performance and efficiency.

Latest Patents

Yamakawa's recent patents showcase advanced control systems for engines. One of his notable innovations is an engine control system that employs phase variable devices for intake and exhaust valves. This system optimally controls exhaust valve timing and fuel supply based on engine temperatures, enhancing combustion efficiency. Another significant patent is an engine system comprising a controller that adjusts the mass ratio of intake air and fuel based on the engine load, enabling efficient combustion methods tailored to various operational demands.

Career Highlights

Throughout his career, Yamakawa has collaborated with leading automotive corporations, including Mazda Motor Corporation and Denso Corporation. His work in these companies has been pivotal in advancing engine technologies, helping to develop solutions that enhance both performance and environmental sustainability.

Collaborations

Yamakawa has worked alongside talented professionals such as Takashi Youso and Tatsuya Fujikawa. Together, they have contributed to groundbreaking advancements in engine technologies, leveraging their collective expertise to push the boundaries of innovation in the automotive sector.

Conclusion

Masahisa Yamakawa’s extensive career and impressive patent portfolio underscore his role as a key innovator in the field of engine control systems. His inventions not only reflect his technical prowess but also his commitment to improving engine performance, making a lasting impact on the automotive industry.

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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