Nagano, Japan

Masatomi Nijoh

This inventor holds 1 USPTO granted patent. Top assignee: Ishiakawjima-Shibaura Machinery Co., Ltd.. Active years: 1999.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masatomi Nijoh. Retrieved from https://idiyas.com/inventor/masatomi-nijoh

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 = 3.0

ph-index = 1

Forward Citations = 23(Granted Patents)


Company Filing History:


Years Active: 1999

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1 patent (USPTO):Explore Patents

Title: Masatomi Nijoh: Innovator in Engine Lubrication Technology

Introduction

Masatomi Nijoh is a notable inventor based in Nagano, Japan. He has made significant contributions to the field of engine technology, particularly in lubrication systems. His innovative approach has led to the development of a unique oil supply apparatus for four-stroke-cycle engines.

Latest Patents

Masatomi Nijoh holds a patent for an oil supply apparatus designed for four-stroke-cycle engines. This invention features an oil supply passage that connects an oil chamber with a valve chamber, along with an oil feed passage linking the valve chamber to a crank chamber. Additionally, it includes an oil return passage that connects the crank chamber back to the oil chamber. The design incorporates multiple return vents on the inner surface of the crank chamber, allowing for effective lubrication even when the engine is tilted in any direction. This innovative system ensures that both the crank chamber and the valve chamber are lubricated through pressure fluctuations caused by the reciprocation of a piston.

Career Highlights

Masatomi Nijoh is associated with Ishiakawjima-Shibaura Machinery Co., Ltd., where he has been instrumental in advancing engine lubrication technologies. His work has garnered attention for its practical applications in improving engine performance and reliability.

Collaborations

Throughout his career, Masatomi has collaborated with esteemed colleagues such as Shigemitsu Aizawa and Toshio Hirabayashi. These partnerships have contributed to the development of innovative solutions in the field of machinery and engine technology.

Conclusion

Masatomi Nijoh's contributions to engine lubrication technology exemplify the spirit of innovation. His patent for an oil supply apparatus showcases his commitment to enhancing engine performance and reliability. Through his work, he continues to influence the future of engine technology.

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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