Tokyo, Japan

Hiroshi Sakai

This inventor holds 61 USPTO granted patents and 16 published patent applications and 6 EPO patents, primarily in Heat Sink Technology. Top assignees: Nec Corporation, Honda Motor Co., Ltd., The Furukawa Electric Co., Ltd.. Active years: 1989-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroshi Sakai. Retrieved from https://idiyas.com/inventor/hiroshi-sakai-7nchd

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

USPTO Granted Patents = 61 

% Patents Active = 68.9

 

Average Co-Inventor Count = 2.9

ph-index = 11

Forward Citations = 486(Granted Patents)

Forward Citations (Not Self Cited) = 480(Dec 10, 2025)


Location History:

  • Hyogo, JP (1989)
  • Asahi Pref., JP (1991)
  • Nishi-kasugai, JP (1992)
  • Wako, JP (2012 - 2014)
  • Kobe, JP (1993 - 2019)
  • Tochigi, JP (2021)
  • Ube, JP (2021 - 2022)
  • Saitama, JP (2015 - 2023)
  • Tokyo, JP (1990 - 2024)

Company Filing History:

goldMedal14 out of 36,684 
 
Nec Corporation
 patents
silverMedal13 out of 22,006 
 
Honda Motor Co., Ltd.
 patents
bronzeMedal8 out of 2,643 
 
The Furukawa Electric Co., Ltd.
 patents
4. 6 out of 53,262 
 
Kabushiki Kaisha Toshiba
 patents
5. 4 out of 1,326 
 
Mitsubishi Jukogyo Kabushiki Kaisha
 patents
6. 4 out of 548 
 
Tokico, Ltd.
 patents
7. 3 out of 27 
 
Techno-Umg Co., Ltd.
 patents
8. 2 out of 1,962 
 
Jfe Steel Corporation
 patents
9. 2 out of 1,921 
 
Kobe Steel, Ltd.
 patents
10. 2 out of 186 
 
Niles Parts Company, Ltd.
 patents
11. 2 out of 3,713 
 
Nippon Steel Corporation
 patents
12. 1 out of 54 
 
Furukawa Electric., Ltd.
 patents
13. 1 out of 99 
 
Kansai University
 patents
14. 1 out of 290 
 
Nec Infrontia Corporation
 patents
15. 1 out of 53 
 
Nippon Steel & Sumikin Engineering Co., Ltd.
 patents
16. 1 out of 60 
 
Nippon Steel Engineering Co., Ltd.
 patents
17. 1 out of 1,102 
 
Nippon Steel Sumitomo Metal Corporation
 patents
18. 1 out of 5,300 
 
Nippon Telegraph and Telephone Corporation
 patents
19. 1 out of 342 
 
Nisshin Steel Co., Ltd.
 patents
20. 1 out of 1,961 
 
Showa Denko K.k.
 patents
where one patent can have more than one assignee

Years Active: 1989-2026

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Areas of Expertise:
Heat Sink
Lithium-Ion Battery
Infrared Sensor
Digital Twin Computing
Hydrogen Storage Material
Thermoplastic Resin
Metal-Oxygen Cell
Vibration Sensor
Current Leak Inspection
Blast Furnace Operation
Cellular Communication
Electronic Packaging
61 patents (USPTO):Explore Patents

Title: Hiroshi Sakai: Innovator in Engineering

Introduction

Hiroshi Sakai, a prolific inventor based in Tokyo, Japan, has made significant contributions to the fields of engineering and environmental sustainability. With an impressive portfolio of 60 patents, his work reflects a commitment to innovation that enhances industrial processes and reduces environmental impact.

Latest Patents

Two of Hiroshi Sakai's latest patents showcase his inventive prowess. The first is a sound reducing device for an internal combustion engine, which comprises a chamber forming member defining a sound reducing chamber that efficiently minimizes noise. This device integrates with a belt cover and cleverly communicates with the belt chamber through an opening, strategically positioned to interact with a portion of a timing belt around the cam pulley.

The second patent relates to a blast furnace operation method. This innovative method involves a process that acquires a correlation between carbon consumption in reducing gas and the specific carbon consumption influenced by the blowing of reducing gas into the blast furnace. It establishes a method for determining optimal carbon consumption and adjusting the reducing gas flow based on pre-set targets, thereby optimizing the efficiency of blast furnace operations.

Career Highlights

Hiroshi has had a distinguished career, contributing his expertise to renowned companies such as NEC Corporation and Honda Motor Co., Ltd. His experiences in these institutions have allowed him to develop groundbreaking technologies that address complex engineering challenges.

Collaborations

Throughout his career, Hiroshi Sakai has collaborated with talented individuals, including notable coworkers like Yoshikatsu Inagaki and Motoji Suzuki. These partnerships have enriched his work, facilitating the exchange of ideas and enhancing innovative outcomes.

Conclusion

Hiroshi Sakai stands as a testament to the spirit of innovation in engineering. His extensive patent portfolio and collaborative efforts underscore his role in advancing technologies that not only drive industrial progress but also foster environmental stewardship. His contributions will undoubtedly influence future generations of engineers and innovators.

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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