logo

For the Inventor, By the Inventor

Kanagawa, Japan

Isao Nunokawa

This inventor holds 24 USPTO granted patents, primarily in Magnetic Recording Technology. Top assignees: Hitachi Global Storage Technologies Netherlands B.v., Hitachi, Ltd., Hgst Netherlands, B.v.. Active years: 1986-2015.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Isao Nunokawa. Retrieved from https://idiyas.com/inventor/isao-nunokawa

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

USPTO Granted Patents = 24

% Patents Active = 33.3

Average Co-Inventor Count = 4.1

ph-index = 10

Forward Citations = 276(Granted Patents)


Location History:

  • Hitachi, JP (1986 - 1996)
  • Kanagawa-ken, JP (2010)
  • Odawara-shi, Kanagawa, JP (2011)
  • Odawara, JP (2004 - 2015)
  • Kanagawa, JP (2009 - 2015)

Company Filing History:

goldMedal9 out of 2,636 
 
Hitachi Global Storage Technologies Netherlands B.v.
 patents
silverMedal7 out of 42,731 
 
Hitachi, Ltd.
 patents
bronzeMedal6 out of 987 
 
Hgst Netherlands, B.v.
 patents
4. 1 out of 227 
 
Hitachi Global Storage Technologies Japan, Ltd.
 patents
5. 1 out of 834,513 
Other
 patents

Years Active: 1986-2015

Loading Chart...
Areas of Expertise:
Magnetic Recording Head
Perpendicular Recording
Magnetic Induction
Heat Sink
Spin Torque Oscillator
MAMR
Electro Lapping Guide
Thin Film
24 patents (USPTO):Explore Patents
1. 9135933 - Tapered write head for MAMR (2015-09-15),
2. 9047885 - Perpendicular magnetic recording head and method of manufacturing the same (2015-06-02),
3. 8995088 - Heat sink for a spin torque oscillator (STO) in microwave assisted magnetic recording (MAMR) (2015-03-31),
4. 8830623 - Shield structure for reducing the magnetic induction rate of the trailing shield and systems thereof (2014-09-09),
5. 8824103 - Magnetic recording head and magnetic recording apparatus (2014-09-02),
6. 8351162 - Magnetic head with electro lapping guide (2013-01-08),
7. 8351154 - Perpendicular recording magnetic head with a varying interval between the main pole and the shield, and methods of manufacturing thereof (2013-01-08),
8. 8351153 - Magnetic recording head, method of manufacturing the same, and magnetic recording/reproducing device (2013-01-08),
9. 8335051 - Perpendicular magnetic recording head having a magnetic layer overhanging a trailing side of a main pole and method of manufacture thereof (2012-12-18),
10. 8203803 - Magnetic recording head for perpendicular recording with wrap around shield, the fabrication process and magnetic disk storage apparatus mounting the magnetic head (2012-06-19),
11. 8107193 - Perpendicular magnetic recording head (2012-01-31),
12. 7990653 - Perpendicular recording magnetic head with a main magnetic pole piece and an auxiliary magnetic pole piece (2011-08-02),
13. 7895732 - Method for manufacturing a perpendicular magnetic recording head (2011-03-01),
14. 7882617 - Method of fabricating a magnetic recording head for perpendicular recording with enhanced covering power (2011-02-08),
15. 7715152 - Magnetic recording head for perpendicular recording, fabrication process, and magnetic disk storage apparatus mounting the magnetic head (2010-05-11),

Title: Isao Nunokawa: Innovator in Magnetic Recording Technology

Introduction

Isao Nunokawa is a notable inventor hailing from Kanagawa, Japan. He has made significant contributions to the field of magnetic recording technology, boasting an impressive portfolio that includes 24 patents. His innovations have paved the way for advancements in data storage solutions.

Latest Patents

Nunokawa's latest patents focus on enhancing magnetic recording devices. One such patent is for a tapered write head for Microwave-Assisted Magnetic Recording (MAMR). This invention presents a head structure that aligns a spin torque oscillator (STO) with a position on the main pole to reduce characteristic variations due to misalignment. By optimizing the angles of inclination, the structure allows for better performance and enhanced field intensity.

Another significant patent describes a perpendicular magnetic recording head and its manufacturing method. This invention is designed to suppress reductions in recording field strength while effectively minimizing fringe fields. The configuration involves strategically positioning side shields further away from the main pole to enhance recording efficiency.

Career Highlights

Isao Nunokawa has held significant roles in prestigious companies such as Hitachi Global Storage Technologies and Hitachi, Ltd. His work at these organizations has contributed vastly to the advancement of storage technologies and innovations in magnetic recording.

Collaborations

Throughout his career, Nunokawa has collaborated with prominent professionals in the field, including colleagues such as Tomohiro Okada and Kimitoshi Etoh. These collaborations have fostered a creative environment, leading to the development of cutting-edge technologies that continue to influence the industry.

Conclusion

With a remarkable track record of 24 patents, Isao Nunokawa stands out as a key figure in the innovation of magnetic recording technology. His recent patents exemplify his commitment to pushing the boundaries of what is possible in data storage solutions. Through his collaborations and work in leading companies, Nunokawa continues to shape the future of technology in profound ways.

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]
Loading…