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For the Inventor, By the Inventor

Aichi, Japan

Tetsuji Yogo

This inventor holds 11 USPTO granted patents. Top assignee: Ngk Spark Plug Company, Limited. Active years: 1997-2004.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tetsuji Yogo. Retrieved from https://idiyas.com/inventor/tetsuji-yogo

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

USPTO Granted Patents = 11

% Patents Active = 100.0

Average Co-Inventor Count = 2.4

ph-index = 5

Forward Citations = 46(Granted Patents)


Location History:

  • Aichi-ken, JP (1999)
  • Nagoya, JP (1997 - 2003)
  • Aichi, JP (2002 - 2004)

Company Filing History:

goldMedal11 out of 2,606 
 
Ngk Spark Plug Company, Limited
 patents

Years Active: 1997-2004

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11 patents (USPTO):Explore Patents
1. 6702466 - Ceramic dynamic-pressure bearing, motor having bearing, hard disk drive, polygon scanner, and method for manufacturing ceramic dynamic-pressure bearing (2004-03-09),
2. 6696376 - Zirconia containing ceramic ball, method for manufacturing same, ceramic ball bearing and check valve (2004-02-24),
3. 6659647 - Ceramic dynamic pressure bearing, motor with bearing, hard disk device, and polygon scanner (2003-12-09),
4. 6619848 - Ceramic dynamic pressure bearing, motor with bearing, hard disc apparatus and polygon scanner (2003-09-16),
5. 6619847 - Ceramic dynamic-pressure bearing, motor having bearing, hard disk drive, and polygon scanner (2003-09-16),
6. 6589448 - Ceramic ball for bearing and ceramic ball bearing using the same (2003-07-08),
7. 6508591 - Conductive ceramic bearing ball, ball bearing, motor having bearing, hard disk drive, and polygon scanner (2003-01-21),
8. 6464906 - Method of manufacturing spherical bodies by rotation, spherical bodies made by the method and a powder composition for use in the method (2002-10-15),
9. 5994250 - Sintered ceramic bodies and ceramic working tools (1999-11-30),
10. 5916833 - Sintered ceramic bodies and ceramic metal working tools (1999-06-29),
11. 5600867 - Car kiln wheel having silicon nitride rotating members (1997-02-11),

Title: Tetsuji Yogo: Innovator in Ceramic Dynamic-Pressure Bearings

Introduction

Tetsuji Yogo is a prominent inventor based in Aichi, Japan. He has made significant contributions to the field of engineering, particularly in the development of ceramic dynamic-pressure bearings. With a total of 11 patents to his name, Yogo's work has advanced the technology used in various mechanical applications.

Latest Patents

Yogo's latest patents include innovations such as a ceramic dynamic-pressure bearing, a motor having a bearing, a hard disk drive, a polygon scanner, and a method for manufacturing ceramic dynamic-pressure bearings. His ceramic dynamic-pressure bearing features dynamic-pressure grooves that are formed by electrolytic etching. These grooves are designed to enhance performance by creating a dynamic-pressure gap that is partially made of ceramic. The design includes a curvature portion with a radius of 3-7 µm at the intersection of the groove sidewall and bottom surfaces. Additionally, his work on zirconia-containing ceramic balls has led to the development of a ceramic ball bearing and a check valve, which utilize a zirconia ceramic material that contains at least 10% by volume of zirconium oxide.

Career Highlights

Yogo is currently employed at NGK Spark Plug Company, Limited, where he continues to innovate and develop new technologies. His expertise in ceramic materials and dynamic-pressure systems has positioned him as a leader in his field.

Collaborations

Throughout his career, Yogo has collaborated with notable coworkers such as Tomonori Niwa and Hironobu Ishikawa. These partnerships have contributed to the successful development of his patented technologies.

Conclusion

Tetsuji Yogo's contributions to the field of ceramic dynamic-pressure bearings and related technologies have made a lasting impact on engineering. His innovative spirit and dedication to research continue to drive advancements in this important area.

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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