Kanagawa, Japan

Tadashi Ariga

This inventor holds 4 USPTO granted patents. Top assignees: Nissan Motor Company Limited, Nippon Denshi Kiki Co., Ltd., Japan Electronic Control Systems Company, Limited. Active years: 1989-1991.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tadashi Ariga. Retrieved from https://idiyas.com/inventor/tadashi-ariga

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

Calculating rank

% Patents Active = 100.0

Average Co-Inventor Count = 4.8

ph-index = 3

Forward Citations = 17(Granted Patents)


Location History:

  • Yokohama, JP (1989)
  • Kanagawa, JP (1990 - 1991)

Company Filing History:


Years Active: 1989-1991

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4 patents (USPTO):Explore Patents

Title: The Innovative Mind of Tadashi Ariga

Introduction

Tadashi Ariga is an accomplished inventor based in Kanagawa, Japan, known for his significant contributions to the field of internal combustion engine technology. With four patents to his name, Ariga has demonstrated a commitment to enhancing engine efficiency and performance.

Latest Patents

One of Ariga's latest inventions is an air/fuel ratio control system for internal combustion engines. This system innovatively performs lambda control by utilizing alpha correction coefficients that vary based on the oxygen concentration in the exhaust gas. It calculates an average value of these coefficients during a specific timeframe after the engine enters an idling state and modifies this value based on engine coolant temperature. Once the predetermined time elapses, this modified average value is used as the alpha correction coefficient.

Another significant patent is a fuel control apparatus for multi-cylinder internal combustion engines. This apparatus features a control circuit that manages the operation of multiple fuel injectors, allowing for precise timing in conjunction with the opening of intake valves. By determining the duration each injector operates based on engine conditions, this invention aids in achieving smoother performance and better engine acceleration.

Career Highlights

Tadashi Ariga has worked with prominent companies that include Nissan Motor Company Limited and Nippon Denshi Kiki Co., Ltd. His experience in these organizations has not only enriched his expertise but also allowed him to contribute effectively to the automotive industry.

Collaborations

Throughout his career, Ariga has collaborated with talented professionals such as Shinpei Nakaniwa and Seiichi Otani. These partnerships have fostered a creative environment for innovation and have been integral to the development of his patented technologies.

Conclusion

As an inventor, Tadashi Ariga continues to push the boundaries of internal combustion engine innovation. His extensive patents and collaborative efforts have significantly impacted the industry's approach to engine performance and efficiency. With ongoing advancements, Ariga remains a vital contributor to the evolution of automotive technology in Japan and beyond.

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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