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.

USPTO Granted Patents = 101 (Patent Applications = 31)

% Patents Active = 14.9

EPO Patents = 1

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:

98 out of 53,240

Kabushiki Kaisha Toshiba

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):Sort by Forward CitationsExplore 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.