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For the Inventor, By the Inventor

Osaka, Japan

Teruo Yoshida

This inventor holds 6 USPTO granted patents. Top assignees: Koyo Seiko Company, Ltd., Nippon Grease Co., Ltd.. Active years: 1985-1991.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Teruo Yoshida. Retrieved from https://idiyas.com/inventor/teruo-yoshida

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

Calculating rank
USPTO Granted Patents = 6

% Patents Active = 100.0

Average Co-Inventor Count = 2.8

ph-index = 4

Forward Citations = 69(Granted Patents)


Location History:

  • Nara, JP (1985)
  • Kashihara, JP (1987)
  • Osaka, JP (1987 - 1991)

Company Filing History:

goldMedal6 out of 772 
 
Koyo Seiko Company, Ltd.
 patents
silverMedal1 out of 8 
 
Nippon Grease Co., Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1985-1991

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6 patents (USPTO):Explore Patents
1. 4999394 - Material for retainers of tapered roller bearings (1991-03-12),
2. 4872771 - Bearing (1989-10-10),
3. 4821385 - Method of making a bearing (1989-04-18),
4. 4668411 - Diurea type grease composition (1987-05-26),
5. 4655617 - Sealed rolling bearing with a flow reducing grease passage (1987-04-07),
6. 4523862 - Tapered roller bearing (1985-06-18),

Title: Teruo Yoshida: Innovator in Bearing Technology

Introduction

Teruo Yoshida is a prominent inventor based in Osaka, Japan. He has made significant contributions to the field of bearing technology, holding a total of 6 patents. His innovative work has had a lasting impact on the industry.

Latest Patents

Yoshida's latest patents include a material for retainers of tapered roller bearings. This retainer comprises a polyamide resin, 10 to 20% by weight of an elastomer, and 15 to 30% by weight of a reinforcing fiber. Another notable patent is for a bearing that features inner and outer rings formed of metal and a plurality of balls made from calcined carbon. This unique design provides self-lubricating properties and hardness that exceeds that of the inner and outer rings. The bearing is baked at a temperature higher than its working temperature to prevent outgassing, even in high-temperature conditions.

Career Highlights

Throughout his career, Yoshida has worked with several notable companies, including Koyo Seiko Company, Ltd. and Nippon Grease Co., Ltd. His expertise in bearing technology has been instrumental in advancing the capabilities of these organizations.

Collaborations

Yoshida has collaborated with talented individuals such as Hiroshi Ueno and Hiroyoshi Yasui. These partnerships have fostered innovation and contributed to the development of cutting-edge technologies in the bearing industry.

Conclusion

Teruo Yoshida's contributions to bearing technology through his patents and collaborations highlight his role as a key innovator in the field. His work continues to influence the industry and inspire future advancements.

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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