For the Inventor, By the Inventor

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Kawasaki, Japan

Toshiba Electronic Devices & Storage Corporation

USPTO Granted Patents = 1,683

% Expired Patents = 2.9

EPO Patents = 37

Trademarks = 20

Forward Citations = 1,073

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997 inventors (with patents filed for the assignee):

Tomoko Matsudai (59 out of 134 patents)

Yoko Iwakaji (55 out of 59 patents)

Naoyuki Narita (53 out of 77 patents)

4. Masayuki Takagishi (49 out of 143 patents)

5. Tomoyuki Maeda (47 out of 113 patents)

6. Tazumi Nagasawa (38 out of 69 patents)

7. Tatsuya Nishiwaki (38 out of 50 patents)

8. Ryohei Gejo (32 out of 39 patents)

9. Hiroaki Katou (32 out of 38 patents)

10. Takeyori Hara (31 out of 58 patents)

11. Nobuhiro Yamamoto (28 out of 37 patents)

12. Yuji Nakagawa (27 out of 27 patents)

13. Nobuhiro Maeto (27 out of 35 patents)

14. Hiroshi Kono (26 out of 66 patents)

15. Hung Hung (25 out of 47 patents)

Core Competencies:

Magnetic Disk Device

Semiconductor Device

Data Processing

Control Circuit

Optical Coupling

Storage Device

IGBT Technology

Manufacturing Method

Head Suspension

Power Supply Circuit

Failure Diagnosis

1,683 patents: Sort by Forward Citations

1. 12740466 - Semiconductor device with a metal array portion with removed corners to reduce metal portion height variations (2026-09-15),

2. 12740124 - Semiconductor device and method for manufacturing (2026-09-15),

3. 12738296 - Magnetic disk device and method (2026-09-15),

4. 12733246 - Semiconductor device (2026-09-08),

5. 12733205 - Silicon carbide based a metal-oxide-semiconductor field-effect transistor (MOSFET) including drift region with stack of n-type an p-type impurity regions (2026-09-08),

6. 12733097 - Disk device (2026-09-08),

7. 12731614 - Magnetic disk device, control method, and learning method (2026-09-08),

8. 12729348 - Cleaning liquid and method for manufacturing semiconductor device (2026-09-08),

9. 12720812 - Semiconductor device (2026-08-25),

10. 12720782 - Semiconductor device (2026-08-25),

11. 12718154 - Data processing device, data processing system, and data processing method (2026-08-25),

12. 12717993 - Arithmetic method and arithmetic device (2026-08-25),

13. 12713649 - SEMICONDUCTOR DEVICE AND METHOD FOR MANUFACTURING SAME (2026-08-18),

14. 12713647 - SEMICONDUCTOR DEVICE WITH DIFFUSION LAYERS IN TERMINATION REGION AND MANUFACTURING METHOD THEREOF (2026-08-18),

15. 12711997 - DISK DEVICE WITH CONSTRAINED LAYER CONFIGURATIONS BETWEEN INNER AND OUTER COVERS (2026-08-18),

Toshiba Electronic Devices & Storage Corporation is a leading manufacturer of advanced electronic components and storage solutions. With a rich heritage dating back over a century, Toshiba offers a wide range of products including semiconductors, memory devices, and storage solutions. Our innovative technologies are used in various industries, such as automotive, industrial, consumer electronics, and IoT. As a global company, Toshiba is committed to delivering high-quality products that enhance the lives of people around the world.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Sep 15 2026

1,683 Patents

#5 in Kawasaki

#138 in Japan

#596 in the World

Kawasaki, Japan

Toshiba Electronic Devices & Storage Corporation

Forward Citations = 1,073

997 inventors:

Tomoko Matsudai (59 out of 134 patents)

Yoko Iwakaji (55 out of 59 patents)

Naoyuki Narita (53 out of 77 patents)

4. Masayuki Takagishi (49 out of 143 patents)

5. Tomoyuki Maeda (47 out of 113 patents)

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