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For the Inventor, By the Inventor

Kashiwa, Japan

Takuji Matsuzawa

This inventor holds 20 USPTO granted patents and 1 published patent application, primarily in Magnetic Disk Technology. Top assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation. Active years: 2013-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takuji Matsuzawa. Retrieved from https://idiyas.com/inventor/takuji-matsuzawa

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

Calculating rank
USPTO Granted Patents = 20 

% Patents Active = 80.0

Average Co-Inventor Count = 1.3

ph-index = 3

Forward Citations = 28(Granted Patents)


Location History:

  • Kashiwa, JP (2013 - 2014)
  • Kawasaki, JP (2015)
  • Chiba, JP (2019)
  • Kashiwa Chiba, JP (2017 - 2024)

Company Filing History:

goldMedal20 out of 53,315 
 
Kabushiki Kaisha Toshiba
 patents
silverMedal10 out of 1,723 
 
Toshiba Electronic Devices & Storage Corporation
 patents
where one patent can have more than one assignee

Years Active: 2013-2026

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Areas of Expertise:
Magnetic Disk Device
Control Method
Learning Method
Dual State Actuators
Parameter Setting
Filter Coefficient
Microactuator Voltage
Position Detecting Device
Disk Storage Apparatus
Servo Controlling
Data Recording Method
Head Position Estimation
20 patents (USPTO):Explore Patents
1. 12731614 - Magnetic disk device, control method, and learning method (2026-09-08),
2. 12456489 - Magnetic disk device (2025-10-28),
3. 12417783 - Magnetic disk drive (2025-09-16),
4. 11990153 - Magnetic disk drive and method of setting a notch filter of the drive (2024-05-21),
5. 11862193 - Magnetic disk device and parameter setting method of magnetic disk device (2024-01-02),
6. 11804244 - Magnetic disk device and filter coefficient setting method of the magnetic disk device (2023-10-31),
7. 11514937 - Magnetic disk device and method of reducing microactuator voltage (2022-11-29),
8. 11094341 - Magnetic disk device (2021-08-17),
9. 10930311 - Dual state actuators controlling for magnetic recording device (2021-02-23),
10. 10497385 - Magnetic disk device and method for suppressing disturbance component having harmonic (2019-12-03),
11. 9947351 - Position detecting device for detecting position in accordance with periodically arranged information, position control device, disk storage device, and position detecting method (2018-04-17),
12. 9824707 - Disk apparatus, driver circuit, and control method (2017-11-21),
13. 9691420 - Disc device, controlling device and method (2017-06-27),
14. 8934190 - Piezoelectric device drive method, piezoelectric device drive apparatus, and magnetic disk device (2015-01-13),
15. 8902540 - Disk storage apparatus and method for servo controlling (2014-12-02),

Title: The Innovations of Takuji Matsuzawa

Introduction

Takuji Matsuzawa, an accomplished inventor based in Kashiwa, Chiba, Japan, has made significant contributions to the field of magnetic disk technology. With a commendable portfolio of 17 patents, Matsuzawa showcases his expertise and dedication to innovation in various applications.

Latest Patents

Among his notable inventions are two significant patents related to magnetic disk drives. The first patent describes a magnetic disk drive that incorporates a notch filter, a parameter storage unit, and a computation unit designed to compute a damping ratio parameter. This innovation enhances the performance of the drive by adjusting to changes in sampling periods, ultimately improving the functionality of the device. The second patent centers on a magnetic disk device equipped with an actuator and controller, utilizing a loop shaping filter to suppress rotation asynchronous disturbances. This invention significantly optimizes the mechanical resonance of the actuator, addressing critical challenges in disk drive technology.

Career Highlights

Throughout his career, Takuji Matsuzawa has been affiliated with prominent organizations, including Toshiba Corporation and Toshiba Electronic Devices & Storage Corporation. His work in these companies has influenced advancements in storage technology, cementing his status as an influential figure in the industry.

Collaborations

Matsuzawa has worked alongside notable colleagues such as Takeyori Hara and Takayuki Kawabe. Their collaborative efforts have likely contributed to the innovative solutions that Matsuzawa has developed, reflecting a strong network of expertise and shared vision within the field.

Conclusion

Takuji Matsuzawa's contributions to magnetic disk technology through his 17 patents highlight his role as a leading inventor. With his innovative approach and collaborative mindset, Matsuzawa continues to shape the future of technology in Japan and beyond. His work serves as an inspiration for aspiring inventors and researchers in the field.

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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