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For the Inventor, By the Inventor

Kawasaki, Japan

Yoshiharu Kasamatsu

This inventor holds 25 USPTO granted patents and 1 published patent application, primarily in Magnetic Recording Technology. Top assignees: Fujitsu Corporation, Fujitsu Limtied, Toshiba Storage Device Corporation. Active years: 1998-2011.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshiharu Kasamatsu. Retrieved from https://idiyas.com/inventor/yoshiharu-kasamatsu

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

USPTO Granted Patents = 25 

% Patents Active = 56.0

Average Co-Inventor Count = 3.2

ph-index = 7

Forward Citations = 195(Granted Patents)


Location History:

  • Kanagawa, JP (1998 - 2002)
  • Atsugi, JP (2004)
  • Kawasaki, KP (2006)
  • Kawasaki, JP (2000 - 2011)

Company Filing History:

goldMedal23 out of 39,378 
 
Fujitsu Corporation
 patents
silverMedal1 out of 9 
 
Fujitsu Limtied
 patents
bronzeMedal1 out of 125 
 
Toshiba Storage Device Corporation
 patents

Years Active: 1998-2011

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Areas of Expertise:
Magnetic Recording Device
Head Slider
Magnetic Disk
Manufacturing Method
Surface Treatment
Water-Repellent Lubricant
Memory Disc
Evaluation Apparatus
Protection Layer
Texturing Surface
Floating Head Slider
Projections
25 patents (USPTO):Explore Patents
1. 8018683 - Head slider and magnetic recording device therewith (2011-09-13),
2. 7697239 - Magnetic head, method of manufacturing the magnetic head, and magnetic disk device (2010-04-13),
3. 7511922 - Head slider having groove on medium-opposed surface and recording medium drive employing the same (2009-03-31),
4. 7501192 - Recording medium including protection layer having unequal property (2009-03-10),
5. 7317594 - Magnetic recording medium, head slider and manufacturing methods therefor (2008-01-08),
6. 7259937 - Magnetic recording device having a head slider utilizing a water-repellant resin lubricant having specified surface tension properties (2007-08-21),
7. 7154710 - Magnetic head slider (2006-12-26),
8. 6985315 - Magnetic disk evaluation apparatus (2006-01-10),
9. 6903901 - Head slider having protector protuberance in front of head element (2005-06-07),
10. 6891699 - Recording medium drive including head slider having protection protuberance standing on air bearing surface (2005-05-10),
11. 6890585 - Method of manufacturing magnetic recording medium and the magnetic recording medium (2005-05-10),
12. 6878398 - Method of manufacturing magnetic recording medium and the magnetic recording medium (2005-04-12),
13. 6754043 - Head slider (2004-06-22),
14. 6511716 - Method of surface treatment for recording medium (2003-01-28),
15. 6468600 - Method of texturing surface of substrate for recording medium (2002-10-22),

Title: Innovations by Yoshiharu Kasamatsu: A Pioneer in Magnetic Head Technology

Introduction

Yoshiharu Kasamatsu, located in Kawasaki, Japan, is a notable inventor renowned for his significant contributions to the field of magnetic recording technologies. With an impressive portfolio of 25 patents, his work has been instrumental in advancing the capabilities of magnetic recording devices.

Latest Patents

Among his recent innovations are two remarkable patents. The first is a "Head Slider and Magnetic Recording Device Therewith," which features a head slider designed to achieve superior head flying stability. This invention incorporates a protective layer comprised of two distinct layers, where the lower layer possesses a smaller ionization potential than that of the upper layer. Additionally, the surface free energy of the upper layer is regulated to be 45 mN/m or less, improving performance metrics. The second patent details a "Magnetic Head, Method of Manufacturing the Magnetic Head, and Magnetic Disk Device." This magnetic head is tailored for use in lamp load type magnetic disk devices. It consists of a head slider that includes a recording and/or reproducing element along with a suspension that supports the head slider. The suspension integrates a magnetic head support unit that engages with a lamp unit during loading and unloading operations, while also featuring a lubricating layer.

Career Highlights

Yoshiharu Kasamatsu's career has been highlighted by his roles at several esteemed organizations, notably Fujitsu Corporation and Fujitsu Limited. His work has consistently pushed the boundaries of what's possible in magnetic technology.

Collaborations

Throughout his career, Kasamatsu has collaborated with prominent professionals in the field, including Takayuki Yamamoto and Toru Yokohata. These collaborations have fostered innovation and development in their respective projects, further enhancing the impact of their collective endeavors.

Conclusion

Yoshiharu Kasamatsu stands as a significant figure in the realm of magnetic recording technology. His extensive patent portfolio and innovative inventions continue to pave the way for advancements in this critical area of technology. As the industry evolves, Kasamatsu's contributions will undoubtedly play a crucial role in shaping the future of magnetic recording devices.

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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