Yokohama, Japan

Hiromichi Ofuji

This inventor holds 8 USPTO granted patents. Top assignees: Nissan Motor Company Limited, Atsugi Motor Parts Company, Limited. Active years: 1980-1990.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiromichi Ofuji. Retrieved from https://idiyas.com/inventor/hiromichi-ofuji

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


% Patents Active = 100.0

Average Co-Inventor Count = 3.9

ph-index = 5

Forward Citations = 106(Granted Patents)


Location History:

  • Yokosuka, JP (1984 - 1985)
  • Yokohama, JP (1980 - 1990)

Company Filing History:


Years Active: 1980-1990

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8 patents (USPTO):Explore Patents

Title: Hiromichi Ofuji: Innovator in Internal Combustion Engine Technology

Introduction

Hiromichi Ofuji is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of internal combustion engine technology, holding a total of 8 patents. His innovative designs focus on enhancing engine performance through variable compression mechanisms.

Latest Patents

Among his latest patents is the "Variable Compression Piston Arrangement for Internal Combustion Engine." This invention utilizes the pressure in a variable volume chamber to control a valve that regulates the supply and drainage of hydraulic fluid. During high load conditions, the high pressure drains the chamber, while under light load, lower pressure allows hydraulic fluid to fill the chamber during induction phases. Another significant patent is the "Variable Compression Control Arrangement for Internal Combustion Engine." This design involves feeding hydraulic fluid into a variable volume chamber defined by two pistons. It allows for high compression engine operation and includes mechanisms to vent hydraulic fluid and maintain its quality.

Career Highlights

Hiromichi Ofuji has worked with prominent companies in the automotive industry, including Nissan Motor Company Limited and Atsugi Motor Parts Company Limited. His experience in these organizations has contributed to his expertise in engine technology and innovation.

Collaborations

Throughout his career, Ofuji has collaborated with talented individuals such as Seinosuke Hara and Yasuo Matsumoto. These partnerships have likely fostered a creative environment that has led to the development of his groundbreaking inventions.

Conclusion

Hiromichi Ofuji's contributions to internal combustion engine technology demonstrate his innovative spirit and dedication to improving engine performance. His patents reflect a deep understanding of hydraulic systems and their application in modern engines.

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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