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Kanagawa, Japan

Hitachi Media Electronics Co., Ltd.

USPTO Granted Patents = 203

EPO Patents = 1

Forward Citations = 566

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207 inventors (with patents filed for the assignee):

Katsuhiko Kimura (37 out of 50 patents)

Tomoto Kawamura (28 out of 44 patents)

Kazuyoshi Yamazaki (27 out of 42 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 Optical Pickup

Optical Information Processing

Objective Lens Drive

Optical Disc Apparatus

Biometric Authentication

Flexible Printed Circuits

Optical Information Recording

Diffraction Grating

Laser Welding Structure

Cooling Arrangement

Lens Driving Mechanism

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),

HITACHI MEDIA ELECTRONICS CO., LTD. is a leading multinational conglomerate company specializing in digital media and electronics. With a rich history spanning over a hundred years, they are committed to delivering innovative solutions that enhance people's lives. Their extensive range of products includes televisions, home appliances, audio systems, and more. Visit their website to explore their cutting-edge technologies and stay updated with their latest offerings.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

203 Patents

#16 in Kanagawa

#676 in Japan

#4,038 in the World

Kanagawa, Japan

Hitachi Media Electronics Co., Ltd.

Forward Citations = 566

207 inventors:

Katsuhiko Kimura (37 out of 50 patents)

Tomoto Kawamura (28 out of 44 patents)

Kazuyoshi Yamazaki (27 out of 42 patents)

4. Hidenao Saito (19 out of 19 patents)

5. Kunikazu Ohnishi (18 out of 38 patents)

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