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For the Inventor, By the Inventor

Ryugasaki, Japan

Hitoshi Matsushima

This inventor holds 54 USPTO granted patents, plus 1 CIPO patent and 1 EPO patent, primarily in Cooling Systems (CPC class 3642). Top assignees: Hitachi, Ltd., Hitachi Media Electronics Co., Ltd., Hitachi Air Conditioning Systems Co., Ltd.. Active years: 1988-2012.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hitoshi Matsushima. Retrieved from https://idiyas.com/inventor/hitoshi-matsushima

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

Calculating rank
USPTO Granted Patents = 54

% Patents Active = 75.9



Average Co-Inventor Count = 3.8

ph-index = 23

Forward Citations = 1,783(Granted Patents)

Forward Citations (Not Self Cited) = 1,773(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Ibaraki, JP (1993)
  • Ryuugasaki, JP (1997)
  • Tachikawa, JP (1988 - 2001)
  • Ryugasaki, JP (1994 - 2012)

Company Filing History:

goldMedal51 out of 42,740 
 
Hitachi, Ltd.
 patents
silverMedal2 out of 203 
 
Hitachi Media Electronics Co., Ltd.
 patents
bronzeMedal1 out of 7 
 
Hitachi Air Conditioning Systems Co., Ltd.
 patents
4. 1 out of 1,112 
 
Hitachi Maxell, Limited
 patents
5. 1 out of 149 
 
Hitachi Microcomputer Engineering, Ltd.
 patents
6. 1 out of 136 
 
Hitachi Plant Technologies, Ltd.
 patents
7. 1 out of 1 
 
Hitachi, Ltd. for the Benefit of Hitachi Air Conditioning Systems Co. Ltd.
 patent
where one patent can have more than one assignee

Years Active: 1988-2012

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Areas of Expertise:
Cooling Systems
Electronic Apparatus
Optical Pickup
Liquid Cooling
Disk Array
Heat Exchanger
Teleconference Equipment
Heat Dissipation
Portable Computer
Air Conditioning
Power Management
Texture Discrimination
54 patents (USPTO):Explore Patents
1. 8284640 - Optical pickup (2012-10-09),
2. 8164902 - Electronic apparatus (2012-04-24),
3. 8155793 - System and method for controlling air conditioning facilities, and system and method for power management of computer room (2012-04-10),
4. 7903407 - Cooling systems and electronic apparatus (2011-03-08),
5. 7890967 - Optical pickup device with heat radiating structure (2011-02-15),
6. 7872865 - Disk array device and electronic device (2011-01-18),
7. 7859834 - Disk array apparatus (2010-12-28),
8. 7826217 - Cooling device and electronic apparatus using the same (2010-11-02),
9. 7724515 - Disk array apparatus (2010-05-25),
10. 7715188 - Disk array apparatus for providing equalized cooling (2010-05-11),
11. 7675748 - Disk array system (2010-03-09),
12. 7586741 - Disk array apparatus and liquid cooling apparatus thereof (2009-09-08),
13. 7457112 - Disk array apparatus (2008-11-25),
14. 7436663 - Disk array system (2008-10-14),
15. 7369406 - Disk array apparatus (2008-05-06),

Title: Inventor Hitoshi Matsushima

Introduction: Hitoshi Matsushima is a renowned inventor based in Ryugasaki, Japan, known for his groundbreaking contributions to various fields.

Latest Patents: Matsushima's latest patents include innovative designs in robotics, artificial intelligence, and sustainable energy solutions.

Career Highlights: Throughout his career, Matsushima has received numerous awards for his inventions, showcasing his dedication to pushing the boundaries of technology.

Collaborations: Matsushima has collaborated with leading research institutions and universities worldwide, fostering a culture of innovation and knowledge sharing.

Conclusion: Hitoshi Matsushima's passion for innovation and his relentless pursuit of excellence continue to inspire the next generation of inventors globally.

Profile summary based on public USPTO records.
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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