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Hitachi Maxwell, Ltd.

USPTO Granted Patents = 56

% Expired Patents = 33.9

Forward Citations = 431

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187 inventors (with patents filed for the assignee):

Harukazu Miyamoto (5 out of 228 patents)

Yoshitake Kato (5 out of 26 patents)

Katsusuke Shimazaki (4 out of 40 patents)

4. Makoto Miyamoto (4 out of 54 patents)

5. Hitoshi Watanabe (3 out of 109 patents)

6. Motoyasu Terao (3 out of 179 patents)

7. Tsuyoshi Maro (3 out of 19 patents)

8. Kazuhiko Daido (3 out of 9 patents)

9. Norio Ohta (3 out of 65 patents)

10. Toshio Niihara (3 out of 22 patents)

11. Akihiko Kanouda (2 out of 74 patents)

12. Masato Isogai (2 out of 22 patents)

13. Hiroyuki Minemura (2 out of 225 patents)

14. Hiroyuki Hirata (2 out of 6 patents)

15. Yoichi Ogawa (2 out of 9 patents)

Core Competencies:

Magnetic Recording Medium

Optical Recording Medium

Nonaqueous Secondary Battery

Electrochemical Capacitor

Information Recording Apparatus

Laser Projector

Image Noise Removal

Biometrics Authentication

Lighting Apparatus

Optical Pickup Lens

Tape Cartridge

DC Backup Power Supply

56 patents: Sort by Forward Citations

1. 9787119 - Electric storage device and method for charging same (2017-10-10),

2. 9122145 - Laser projector with reduced speckle (2015-09-01),

3. 8929439 - Compressed image noise removal device and reproduction device (2015-01-06),

4. D718802 - Projector (2014-12-02),

5. 8822082 - Separator for electrochemical device, electrode for electrochemical device, and electrochemical device (2014-09-02),

6. 8427926 - Optical pickup lens (2013-04-23),

7. 8404163 - Method for producing molded article (2013-03-26),

8. 8027519 - Imaging module for biometrics authentication, biometrics authentication apparatus and prism (2011-09-27),

9. 7965469 - Tape cartridge and tape loading system using same (2011-06-21),

10. 7884898 - Optical sheet for backlight, backlight, and display device (2011-02-08),

11. 7829061 - Zirconium oxide hydrate particles and method for producing the same (2010-11-09),

12. 7787349 - Optical pickup lens and optical pickup apparatus (2010-08-31),

13. 7748638 - Non-contact IC module (2010-07-06),

14. 7495415 - DC backup power supply system (2009-02-24),

15. 7477587 - Information-recording method and information-recording medium (2009-01-13),

Company Overview

Hitachi Maxwell, Ltd., based in Osaka, Japan, specializes in advanced information storage technology. The company is known for its development and manufacturing of magnetic and optical recording media, which are essential for data storage solutions. Additionally, Hitachi Maxwell focuses on innovative energy solutions, including nonaqueous secondary batteries and electrochemical capacitors. Their expertise extends to information recording apparatus, laser projectors, and image noise removal technologies, as well as biometrics authentication systems, positioning them as a key player in the tech landscape.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

56 Patents

#176 in Osaka

#1,607 in Japan

#12,754 in the World

Hitachi Maxwell, Ltd.

Forward Citations = 431

187 inventors:

Harukazu Miyamoto (5 out of 228 patents)

Yoshitake Kato (5 out of 26 patents)

Katsusuke Shimazaki (4 out of 40 patents)

4. Makoto Miyamoto (4 out of 54 patents)

5. Hitoshi Watanabe (3 out of 109 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Maxwell, Ltd.. Retrieved from https://idiyas.com/company/hitachi-maxwell

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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