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For the Inventor, By the Inventor

Kawagoe, Japan

Masukazu Igarashi

This inventor holds 45 USPTO granted patents and 1 published patent application, primarily in Spin Torque Oscillator. Top assignees: Hitachi, Ltd., Hgst Netherlands, B.v., Hitachi Global Storage Technologies Netherlands B.v.. Active years: 1996-2016.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masukazu Igarashi. Retrieved from https://idiyas.com/inventor/masukazu-igarashi

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

USPTO Granted Patents = 45 

% Patents Active = 60.0

Average Co-Inventor Count = 4.0

ph-index = 13

Forward Citations = 534(Granted Patents)


Location History:

  • Tokyo, JP (2014)
  • Kawagoe, JP (1996 - 2016)
  • Saitama, JP (2008 - 2016)

Company Filing History:

goldMedal31 out of 42,731 
 
Hitachi, Ltd.
 patents
silverMedal11 out of 987 
 
Hgst Netherlands, B.v.
 patents
bronzeMedal3 out of 2,636 
 
Hitachi Global Storage Technologies Netherlands B.v.
 patents

Years Active: 1996-2016

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Areas of Expertise:
Spin Torque Oscillator
Microwave-Assisted Recording
Magnetic Recording Media
Magnetic Head
High Spin-Torque Efficiency
Thermally Assisted Recording
Magnetic Flux Rectifying Layer
Dual Spin Polarization Layer
Energy-Assisted Magnetic Recording
Information Recording Device
Recording Equalizer
Magnetic Storage Device
45 patents (USPTO):Explore Patents
1. 9437222 - Spin torque oscillator with high spin torque efficiency and reliability (2016-09-06),
2. 9378759 - Spin torque oscillator with low magnetic moment and high perpendicular magnetic anisotropy material (2016-06-28),
3. 9336797 - Extended spin torque oscillator (2016-05-10),
4. 9311934 - Symmetrical STO for oscillation with both polarity bias (2016-04-12),
5. 9305586 - Microwave-assisted magnetic recording device and method of formation thereof (2016-04-05),
6. 9305574 - Negative-polarization spin-torque-oscillator (2016-04-05),
7. 9275672 - Magnetic head, magnetic recording method and apparatus for controlling magnetic head with spin torque oscillator in a disk drive (2016-03-01),
8. 9230569 - Low Bs spin-polarizer for spin torque oscillator (2016-01-05),
9. 9099107 - Stabilizing layer for a spin torque oscillator (STO) (2015-08-04),
10. 9007723 - Microwave-assisted magnetic recording (MAMR) head employing advanced current control to establish a magnetic resonance state (2015-04-14),
11. 9007722 - High frequency magnetic field assisted magnetic recording head (2015-04-14),
12. 9007721 - Microwave assisted magnetic recording head having spin torque oscillator, and magnetic recording apparatus (2015-04-14),
13. 8937789 - Microwave assisted magnetic recording head and magnetic data storage apparatus (2015-01-20),
14. 8883327 - Microwave assisted magnetic recording medium and information recording apparatus using the same (2014-11-11),
15. 8879205 - High spin-torque efficiency spin-torque oscillator (STO) with dual spin polarization layer (2014-11-04),

Title: Masukazu Igarashi: Pioneering Inventor from Kawagoe

Introduction: Masukazu Igarashi is a renowned inventor hailing from Kawagoe, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Masukazu Igarashi holds several patents in the areas of robotics, artificial intelligence, and sustainable energy solutions, showcasing his versatility and forward-thinking approach to invention.

Career Highlights: With over two decades of experience in the tech industry, Masukazu Igarashi has worked with leading research institutions and multinational corporations to develop cutting-edge technologies that have revolutionized various sectors.

Collaborations: Throughout his career, Masukazu Igarashi has collaborated with top engineers, scientists, and designers from around the world, fostering a culture of innovation and excellence in all his projects.

Conclusion: Masukazu Igarashi's passion for innovation and his relentless pursuit of technological advancement continue to inspire the next generation of inventors and shape the future of the industry.

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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