Kokubunji, Japan

Yuji Masumoto

This inventor holds 2 USPTO granted patents. Top assignees: Ishikawajima-Harima Jukogyo Kabushiki Kaisha, Kabushiki Kaisha Toshiba, Koyo Seiko Kabushiki Kaisha. Active years: 1987-1988.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yuji Masumoto. Retrieved from https://idiyas.com/inventor/yuji-masumoto

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 = 4.2

ph-index = 2

Forward Citations = 32(Granted Patents)


Company Filing History:


Years Active: 1987-1988

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2 patents (USPTO):Explore Patents

Title: Yuji Masumoto: Innovator in Ceramic Bearing Technology

Introduction

Yuji Masumoto is a notable inventor based in Kokubunji, Japan. He has made significant contributions to the field of bearing technology, holding a total of 2 patents. His innovative designs focus on enhancing the performance and durability of ceramic bearings.

Latest Patents

Masumoto's latest patents include a groundbreaking ceramic bearing construction. This invention prevents cracking of a ceramic bearing fitted over a metal shaft by incorporating grooves on the inner periphery of the ceramic inner race and/or on the outer periphery of the metal shaft. Another significant patent involves bearings for rotary machines. In this design, a pin that acts as a spring extends directly through the outer race without the need for an outer-race casing and a pin holder. The central portion of the pin supports the outer race, while snap rings fitted on both ends restrict axial movement of the pin beyond a predetermined range. An oil film is formed between the outer peripheral surface of the outer race and the inner peripheral surface of casings, with oil reservoirs defined to dampen axial movement of the outer race.

Career Highlights

Throughout his career, Yuji Masumoto has worked with prominent companies such as Ishikawajima-Harima Jukogyo Kabushiki Kaisha and Toshiba Corporation. His experience in these organizations has contributed to his expertise in the field of engineering and innovation.

Collaborations

Masumoto has collaborated with talented individuals such as Yuko Yamashita and Shinobu Saito. These partnerships have likely fostered a creative environment that has led to the development of his innovative patents.

Conclusion

Yuji Masumoto's contributions to ceramic bearing technology demonstrate his commitment to innovation and engineering excellence. His patents reflect a deep understanding of mechanical design and functionality, making him a significant figure in his field.

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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