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For the Inventor, By the Inventor

Tokyo, Japan

Koichi Yasuda

This inventor holds 18 USPTO granted patents and 1 published patent application and 2 EPO patents, primarily in Optical Recording Media. Top assignees: Sony Corporation, Kawasaki Steel Corporation, Jfe Steel Corporation. Active years: 1986-2008.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Koichi Yasuda. Retrieved from https://idiyas.com/inventor/koichi-yasuda

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

Calculating rank
USPTO Granted Patents = 18 

% Patents Active = 83.3

 

Average Co-Inventor Count = 2.3

ph-index = 8

Forward Citations = 275(Granted Patents)


Location History:

  • Okayama, JP (1998)
  • Kanagawa, JP (1997 - 2002)
  • Chiba, JP (1986 - 2004)
  • Tokyo, JP (1990 - 2008)

Company Filing History:

goldMedal12 out of 58,148 
 
Sony Corporation
 patents
silverMedal4 out of 1,256 
 
Kawasaki Steel Corporation
 patents
bronzeMedal1 out of 1,974 
 
Jfe Steel Corporation
 patents
4. 1 out of 8,271 
 
Tdk Corporation
 patents

Years Active: 1986-2008

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Areas of Expertise:
Optical Recording Medium
Multilayer Optical Disc
Phase-Change Technology
High Transfer Rate
Welding Methods
Steel Wire
Light Transmissive Layer
Recording Track
Initialization Method
Spot-Weldability
High Strength Steel
Coil Device
18 patents (USPTO):Explore Patents
1. 7390546 - Optical recording medium (2008-06-24),
2. 6956809 - Multilayer phase-change type optical disc capable of recording and reproducing information at high transfer rate (2005-10-18),
3. 6784402 - Steel wire for MAG welding and MAG welding method using the same (2004-08-31),
4. 6574180 - Multilayer optical disk and method of initializing the same (2003-06-03),
5. 6511788 - Multi-layered optical disc (2003-01-28),
6. 6434108 - Optical disc having narrow recording track relative to light spot diameter (2002-08-13),
7. 6246656 - Reduced thickness of a light transmissive layer for a high density optical disc (2001-06-12),
8. 6221455 - Multi-layer optical disc and recording/reproducing apparatus (2001-04-24),
9. 5972459 - Optical recording medium and optical disk apparatus (1999-10-26),
10. 5923639 - Phase-change optical recording medium having an additive related to the (1999-07-13),
11. 5837956 - Method of fabricating high strength and high toughness large-diameter (1998-11-17),
12. 5768221 - Method of and apparatus for initializing multi-layer optical recording (1998-06-16),
13. 5741603 - Optical disc (1998-04-21),
14. 5657310 - Optical disc (1997-08-12),
15. 5019460 - Galvannealed steel sheet having improved spot-weldability (1991-05-28),

Title: Koichi Yasuda: Innovator in Optical Recording Technology

Introduction

Koichi Yasuda is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of optical recording technology, holding a total of 18 patents. His work has advanced the capabilities of optical media, enhancing data storage and retrieval processes.

Latest Patents

Yasuda's latest patents include an innovative optical recording medium. This medium features a substrate with a concave and convex shape that divides a track area on its surface. The optical recording layer consists of a compound made of tin (Sn), nitrogen (N), and oxygen (O). This arrangement improves jitter issues associated with using Sn as a recording material. Another notable patent is for a multilayer phase-change type optical disc. This disc is designed to record and reproduce information at high transfer rates, utilizing a phase change recording material that includes antimony (Sb) and tellurium (Te) as major components.

Career Highlights

Throughout his career, Yasuda has worked with notable companies such as Sony Corporation and Kawasaki Steel Corporation. His experience in these organizations has allowed him to develop and refine his innovative ideas in optical technology.

Collaborations

Yasuda has collaborated with esteemed colleagues, including Kotaro Kurokawa and Osamu Kawakubo. Their joint efforts have contributed to the advancement of optical recording technologies.

Conclusion

Koichi Yasuda's contributions to optical recording technology have made a lasting impact on the industry. His innovative patents and collaborations reflect his dedication to advancing data storage solutions.

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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