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For the Inventor, By the Inventor

Tokyo, Japan

Masatoshi Sakurai

This inventor holds 101 USPTO granted patents and 31 published patent applications and 1 EPO patent, primarily in Magnetic Recording Technology (CPC class 40414). Top assignees: Kabushiki Kaisha Toshiba, Showa Denko K.k., Takara Co., Ltd.. Active years: 1992-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masatoshi Sakurai. Retrieved from https://idiyas.com/inventor/masatoshi-sakurai

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

Calculating rank
USPTO Granted Patents = 101 

% Patents Active = 14.9


Average Co-Inventor Count = 3.4

ph-index = 9

Forward Citations = 414(Granted Patents)

Forward Citations (Not Self Cited) = 346(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Nerima-Ku, JP (2004 - 2010)
  • Tokyo, JP (1992 - 2015)
  • Nerima, JP (2016)

Company Filing History:

goldMedal98 out of 53,286 
 
Kabushiki Kaisha Toshiba
 patents
silverMedal5 out of 1,961 
 
Showa Denko K.k.
 patents
bronzeMedal2 out of 329 
 
Takara Co., Ltd.
 patents
4. 1 out of 1,358 
 
The University of Tokyo
 patents
where one patent can have more than one assignee

Years Active: 1992-2026

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Areas of Expertise:
Magnetic Recording Medium
Manufacturing Method
Patterned Media
Stamper
Evaluation Method
Magnetic Apparatus
Read/Write Apparatus
Ultraviolet-Curing Resin
Perpendicular Magnetic Recording
Magnetic Storage Medium
101 patents (USPTO):Explore Patents
1. 12674139 - Serum-free medium not containing albumin and suited for culturing human hematopoietic stem cells, and albumin-free culturing method (2026-07-07),
2. 9488541 - Pressure sensor, microphone, and acoustic processing system (2016-11-08),
3. 9012046 - Magnetic recording medium, method of manufacturing the same, and magnetic recording/reproduction apparatus (2015-04-21),
4. 8989525 - Light deflecting element (2015-03-24),
5. 8842392 - Magnetic recording medium and magnetic recording apparatus (2014-09-23),
6. 8829070 - Ultraviolet-curable resin material for pattern transfer and magnetic recording medium manufacturing method using the same (2014-09-09),
7. 8815336 - Magnetic recording medium manufacturing method (2014-08-26),
8. 8786971 - Magnetic recording apparatus having variable-width tracks and method of testing same (2014-07-22),
9. 8778162 - Stamper and method of manufacturing the same (2014-07-15),
10. 8748017 - Magnetic recording medium (2014-06-10),
11. 8703621 - Manufacturing method of magnetic recording medium (2014-04-22),
12. 8681454 - Patterned medium and method of manufacturing the same (2014-03-25),
13. 8643970 - Magnetic recording apparatus and recording method of magnetic recording apparatus (2014-02-04),
14. 8551685 - Ultraviolet-curing resin material for pattern transfer and magnetic recording medium manufacturing method using the same (2013-10-08),
15. 8551348 - Magnetic recording medium and method of manufacturing the same (2013-10-08),

Title: The Inventor Extraordinaire: Masatoshi Sakurai

Introduction: Meet Masatoshi Sakurai, a prolific inventor hailing from Tokyo, Japan, with an impressive portfolio of 100 patents under his belt.

Latest Patents: Among his recent innovations are a cutting-edge pressure sensor, microphone, and acoustic processing system. The pressure sensor he developed features a sensor section with transducing thin film, strain sensing elements, and a processing circuit for accurate output signals. Additionally, his magnetic recording medium involves gas ion irradiation to enhance performance in recording and reproduction apparatus.

Career Highlights: Sakurai has showcased his inventive prowess at renowned companies like Toshiba and Showa Denko, where he has undoubtedly left a lasting impact with his groundbreaking creations.

Collaborations: Throughout his career, Sakurai has collaborated closely with esteemed colleagues such as Yoshiyuki Kamata and Kaori Kimura, reflecting his collaborative spirit and ability to work effectively in a team setting.

Conclusion: Masatoshi Sakurai's innovative spirit and dedication to pushing the boundaries of technology have solidified his reputation as a visionary inventor, shaping the landscape of modern inventions. His remarkable contributions continue to inspire and drive advancements in various industries.

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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