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.

USPTO Granted Patents = 54

% Patents Active = 75.9

CIPO Patents = 1

EPO Patents = 1

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:

Hitachi Media Electronics Co., Ltd.

patents

1 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):Sort by Forward CitationsExplore 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.