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For the Inventor, By the Inventor

Kawasaki, Japan

Kazuhiko Takaishi

This inventor holds 69 USPTO granted patents and 3 published patent applications, primarily in Disk Drive Technology (CPC class 360 ). Top assignees: Fujitsu Corporation, Kabushiki Kaisha Toshiba, Toshiba Storage Device Corporation. Active years: 1992-2024.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazuhiko Takaishi. Retrieved from https://idiyas.com/inventor/kazuhiko-takaishi

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

Calculating rank
USPTO Granted Patents = 69 

% Patents Active = 75.4

Average Co-Inventor Count = 1.3

ph-index = 11

Forward Citations = 425(Granted Patents)

Forward Citations (Not Self Cited) = 369(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Atsugi, JP (1992)
  • Kawasaki, JP (1998 - 2011)
  • Tokyo, JP (2011 - 2018)
  • Machida Tokyo, JP (2016 - 2018)

Company Filing History:

goldMedal46 out of 39,378 
 
Fujitsu Corporation
 patents
silverMedal11 out of 53,286 
 
Kabushiki Kaisha Toshiba
 patents
bronzeMedal11 out of 125 
 
Toshiba Storage Device Corporation
 patents
4. 1 out of 1 
 
Fukitsu Limited
 patent
5. 1 out of 1,715 
 
Toshiba Electronic Devices & Storage Corporation
 patents
where one patent can have more than one assignee

Years Active: 1992-2024

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Areas of Expertise:
Disk Drive
Head Position Control
Magnetic Disk Device
Servo Data Writing
Position Control
Information Storage
Storage Device
Seek Control
Demodulation Method
Manufacturing Method
Correction Table
Positioning Control
69 patents (USPTO):Explore Patents
1. 12094505 - Magnetic disk device and reference pattern writing method of the same preliminary class (2024-09-17),
2. 10115422 - Hard disk drive, manufacturing method of the same, and servo data writing method (2018-10-30),
3. 9905257 - Hard disk drive, manufacturing method of the same, and servo data writing method (2018-02-27),
4. 9837114 - Disk device and method for manufacturing disk device (2017-12-05),
5. 9466328 - Contact-detecting method, manufacturing method of disk drive, and disk drive (2016-10-11),
6. 8817416 - Magnetic disk device and method of controlling magnetic heads (2014-08-26),
7. 8773808 - Magnetic disk device and head-position control method (2014-07-08),
8. 8625230 - Position demodulator and position demodulation method (2014-01-07),
9. 8553345 - Position demodulation apparatus and position demodulation method (2013-10-08),
10. 8520334 - Disk storage device, controller of the same, controlling method performed by the same, and electronic device (2013-08-27),
11. 8514512 - Disk storage device, controller of the same, controlling method performed by the same, and electronic device (2013-08-20),
12. 8068307 - Position control apparatus and disk apparatus using the same (2011-11-29),
13. 8049987 - Position control apparatus and disk apparatus using the same (2011-11-01),
14. 8023222 - Information storage device and computer product (2011-09-20),
15. 8009382 - Position control apparatus and disk apparatus using the same (2011-08-30),

Title: Innovations of Kazuhiko Takaishi: A Pioneering Inventor in Magnetic Disk Technology

Introduction

Kazuhiko Takaishi, a prominent inventor based in Kawasaki, Japan, has made significant contributions to the field of magnetic disk technology. With an impressive portfolio of 69 patents, Takaishi's work has played a crucial role in advancing the efficiency and performance of magnetic storage devices.

Latest Patents

Among Takaishi's recent inventions are two notable patents. The first, a "Magnetic disk device and reference pattern writing method of the same preliminary class," introduces a technique where multiple simulated reference patterns are written to a magnetic disk under varying conditions. This method allows for the detection of each pattern's write state and the selection of optimal write conditions for subsequent reference patterns. The second patent, titled "Hard disk drive, manufacturing method of the same, and servo data writing method," details a novel approach for writing servo data as the read/write head moves across the disk. This ensures that data is accurately overwritten and enhances the device's operational reliability.

Career Highlights

Throughout his career, Takaishi has worked with esteemed organizations such as Fujitsu Corporation and Toshiba Corporation. His experience in these companies has provided him with a robust platform to innovate and develop advanced storage technologies. His patents reflect a deep understanding of magnetic disk mechanics and the demands of modern data storage.

Collaborations

Takaishi has collaborated with notable colleagues, including Kunihiro Shimada and Shunji Saito. Together, they have contributed to the innovative landscape of data storage, further enhancing the capabilities of hard disk drives and related technologies.

Conclusion

Kazuhiko Takaishi stands out as a visionary inventor in the realm of magnetic technology. His extensive patent portfolio not only illustrates his innovative spirit but also underscores his commitment to advancing storage solutions. As technology continues to evolve, Takaishi's contributions will undoubtedly leave a lasting impact on 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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