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Hitachi Media Electronics Co., Ltd.

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USPTO Granted Patents = 203

% Expired Patents = 81.3

EPO Patents = 1

Forward Citations = 579

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204 inventors (with patents filed for the assignee):

Katsuhiko Kimura (37 out of 50 patents)

Tomoto Kawamura (28 out of 45 patents)

Kazuyoshi Yamazaki (27 out of 44 patents)

4. Hidenao Saito (19 out of 19 patents)

5. Kunikazu Ohnishi (18 out of 38 patents)

6. Jun Hato (16 out of 17 patents)

7. Manabu Ochi (15 out of 17 patents)

8. Shigeharu Kimura (14 out of 28 patents)

9. Hiroaki Furuichi (12 out of 28 patents)

10. Yoshiro Konishi (11 out of 32 patents)

11. Seiichi Katou (11 out of 27 patents)

12. Kengo Asai (11 out of 27 patents)

13. Mitsutaka Hikita (11 out of 32 patents)

14. Nobuhiko Shibagaki (10 out of 21 patents)

15. Yasuo Kitada (10 out of 15 patents)

Core Competencies:

Optical Pickup

Holographic Device

Lens Actuator

Optical Information

Optical Disc

Biometric Authentication

Diffraction Grating

Image Display

Flexible Printed Circuits

Cooling Arrangement

Data Recording

Tracking Control

203 patents: Sort by Forward Citations

1. 9076494 - Optical pick up including protrusion portion to position optical element (2015-07-07),

2. 8937855 - Holographic optical pickup device, optical information recording and reproducing device, and method of reproducing optical information, having angular variable element arrangements for changing a light angle (2015-01-20),

3. 8902723 - Fixing structure of optical component, fixing method of optical component, optical pick-up device, and module device with light sources of RGB three primary colors (2014-12-02),

4. 8873173 - Object lens drive unit and optical pickup using the same (2014-10-28),

5. 8830810 - Holographic optical pickup device, optical information recording and reproducing device, and method of recording and reproducing optical information (2014-09-09),

6. 8804474 - Optical information recording/reproducing apparatus (2014-08-12),

7. 8743668 - Objective lens drive device and optical pickup (2014-06-03),

8. 8737184 - Holographic optical pickup device, optical information recording and reproducing device, and method of recording and reproducing optical information (2014-05-27),

9. 8737180 - Optical pickup device and optical disc apparatus for recording and reproducing information on and from optical disc including plurality of recording layers (2014-05-27),

10. 8711666 - Adhesive structure of optical device, adhesion method, and optical pickup device (2014-04-29),

11. 8693075 - Scan type image display device (2014-04-08),

12. 8675459 - Optical disk apparatus (2014-03-18),

13. 8675458 - Connection structure of flexible printed circuits and optical pickup device (2014-03-18),

14. 8645979 - Optical pickup (2014-02-04),

15. 8644120 - Optical information processing device and tracking control method thereof for use with grooveless multilayer optical disc (2014-02-04),

Company Overview

Hitachi Media Electronics Co., Ltd., based in Iwate, Japan, specializes in the development and manufacturing of optical pickup devices. The company focuses on advanced technologies such as holographic devices, lens actuators, and optical information systems. Its expertise extends to optical discs and biometric authentication, leveraging innovations in diffraction grating and image display. Hitachi Media Electronics plays a significant role in enhancing optical technologies, contributing to various applications across industries.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

203 Patents

#1 in Iwate

#694 in Japan

#4,180 in the World

Hitachi Media Electronics Co., Ltd.

Forward Citations = 579

204 inventors:

Katsuhiko Kimura (37 out of 50 patents)

Tomoto Kawamura (28 out of 45 patents)

Kazuyoshi Yamazaki (27 out of 44 patents)

4. Hidenao Saito (19 out of 19 patents)

5. Kunikazu Ohnishi (18 out of 38 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Media Electronics Co., Ltd.. Retrieved from https://idiyas.com/company/hitachi-media-electronics-company

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

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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