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For the Inventor, By the Inventor

Kuwana, Japan

Naoaki Tsuji

This inventor holds 7 USPTO granted patents. Top assignee: Ntn Corporation. Active years: 2009-2021.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Naoaki Tsuji. Retrieved from https://idiyas.com/inventor/naoaki-tsuji

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

USPTO Granted Patents = 7

% Patents Active = 42.9

Average Co-Inventor Count = 3.2

ph-index = 2

Forward Citations = 18(Granted Patents)


Location History:

  • Inabe, JP (2011 - 2012)
  • Kuwana, JP (2009 - 2015)
  • Mie, JP (2017 - 2021)

Company Filing History:

goldMedal7 out of 2,496 
 
Ntn Corporation
 patents

Years Active: 2009-2021

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7 patents (USPTO):Explore Patents
1. 10914343 - Ball bearing (2021-02-09),
2. 9982716 - Synthetic resin retainer and ball bearing (2018-05-29),
3. 9631672 - Solid-lubrication rolling bearing (2017-04-25),
4. 9074630 - Roller bearing (2015-07-07),
5. 8227950 - Rolling bearing, spindle support structure of main motor for railway vehicle, and bearing structure (2012-07-24),
6. 8044544 - Rolling bearing, spindle support structure of main motor for railway vehicle, and bearing structure (2011-10-25),
7. 7503697 - Rolling bearing assembly having an improved resistance to electric corrosion (2009-03-17),

Title: Naoaki Tsuji: Innovator in Ball Bearing Technology

Introduction

Naoaki Tsuji is a prominent inventor based in Kuwana, Japan. He has made significant contributions to the field of ball bearing technology, holding a total of 7 patents. His innovative designs focus on reducing noise and enhancing the performance of ball bearings.

Latest Patents

Tsuji's latest patents include a novel ball bearing design that features inner and outer races with raceway grooves. This design incorporates balls and a synthetic resin retainer, which effectively reduces abnormal noise during operation. The raceway groove of the inner race, or each of the raceway grooves of both the inner and outer races, has a radius of curvature that is between 104% and 109% of the radius of each ball. Another significant patent involves a synthetic resin retainer that consists of two annular members with opposed surfaces. These members are formed with multiple circumferentially spaced pockets that receive the balls. The design includes axially concave, arc-shaped pocket wall portions and flat plate-shaped coupling plate portions, which have specific thicknesses relative to the diameters of the balls.

Career Highlights

Naoaki Tsuji is associated with NTN Corporation, a leading company in the manufacturing of bearings and related products. His work has been instrumental in advancing the technology and efficiency of ball bearings, contributing to various applications across industries.

Collaborations

Tsuji has collaborated with notable coworkers, including Hideji Ito and Hikaru Ishida. Their combined expertise has fostered innovation and development within NTN Corporation.

Conclusion

Naoaki Tsuji's contributions to ball bearing technology exemplify his commitment to innovation and excellence. His patents reflect a deep understanding of engineering principles and a dedication to improving product performance.

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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