Tokyo, Japan

Takashi Yokoyama

This inventor holds 84 USPTO granted patents and 2 published patent applications and 4 EPO patents, primarily in Semiconductor Devices (CPC class 257666). Top assignees: Hitachi, Ltd., Nec Corporation, Nkk Corporation. Active years: 1977-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takashi Yokoyama. Retrieved from https://idiyas.com/inventor/takashi-yokoyama

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

USPTO Granted Patents = 84 

% Patents Active = 85.7

 

Average Co-Inventor Count = 3.2

ph-index = 15

Forward Citations = 1,229(Granted Patents)

Forward Citations (Not Self Cited) = 1,199(Dec 10, 2025)


Inventors with similar research interests:

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Location History:

  • Hitachi, JA (1977)
  • Yakuohji, JA (1977)
  • Kodaira, JP (1989)
  • Katsuta, JP (1992 - 1996)
  • Hitachinaka, JP (1998 - 2002)
  • Hitachi-shi, Ibaragi, JP (2003)
  • Hitachi, JP (1990 - 2005)
  • Yokohama, JP (1993 - 2015)
  • Akishima, JP (2019 - 2020)
  • Tokyo, JP (1979 - 2024)

Company Filing History:

goldMedal37 out of 42,740 
 
Hitachi, Ltd.
 patents
silverMedal12 out of 36,718 
 
Nec Corporation
 patents
bronzeMedal6 out of 614 
 
Nkk Corporation
 patents
4. 5 out of 576 
 
Tachi-S Co., Ltd.
 patents
5. 4 out of 2,467 
 
Nec Electronics Corporation
 patents
6. 3 out of 152 
 
Hitachi Automotive Engineering Co., Ltd.
 patents
7. 3 out of 614 
 
Mitsubishi Chemical Industries Limited
 patents
8. 2 out of 2,004 
 
Citizen Watch Company, Ltd.
 patents
9. 2 out of 129 
 
Hitachi Communication Technologies, Ltd.
 patents
10. 2 out of 4,751 
 
Mitsubishi Heavy Industries Limited
 patents
11. 2 out of 651 
 
Mitsubishi Hitachi Power Systems, Ltd.
 patents
12. 2 out of 5,088 
 
Ngk Insulators, Inc.
 patents
13. 2 out of 3,781 
 
Renesas Technology Corp.
 patents
14. 1 out of 248 
 
Hitachi Car Engineering Co., Ltd.
 patents
15. 1 out of 1,068 
 
Japan Tobacco Inc.
 patents
16. 1 out of 221 
 
Mitsubishi Power, Ltd.
 patents
17. 1 out of 1,445 
 
Stanley Electric Co., Ltd
 patents
18. 1 out of 625 
 
Sumco Corporation
 patents
19. 5 out of 834,570 
Other
 patents
where one patent can have more than one assignee

Years Active: 1977-2025

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Areas of Expertise:
Semiconductor Device
Dual Damascene Structure
Electric Throttle-Control
Handover Method
Gas Turbine Blade
Vehicle Seat
Communication System
Silicon Crystal Production
Packet Forwarding
Incineration Apparatus
Multicast Packet Control
84 patents (USPTO):Explore Patents

Title: Takashi Yokoyama: A Visionary Inventor Shaping the Future of Technology

Introduction:

Takashi Yokoyama, a renowned inventor based in Tokyo, Japan, has garnered recognition for his passion for innovation and relentless pursuit of excellence in the field of technology. With a total of 83 patents to his name, Yokoyama's inventive spirit continues to inspire the next generation of inventors worldwide.

Latest Patents:

Yokoyama's recent patents showcase his expertise in turbine design and operation. His innovative turbine blade design features a platform, airfoil portion, blade root portion, and shank with unique lateral surfaces, setting new standards in turbine efficiency. Additionally, his method for operating a gas turbine incorporates advanced control parameters based on compressor metal temperature, enhancing turbine performance and longevity.

Career Highlights:

Having worked at esteemed companies such as Hitachi, Ltd. and NEC Corporation, Yokoyama has honed his skills and expertise in the technology sector. His contributions to various projects and inventions have not only propelled these companies forward but have also solidified his reputation as a visionary inventor in the industry.

Collaborations:

Throughout his career, Yokoyama has collaborated with talented individuals such as Gen Murakami and Kunihiro Tsubosaki, sharing knowledge and expertise to create groundbreaking innovations. These collaborations have not only enriched Yokoyama's own inventions but have also fostered a culture of innovation and collaboration within the organizations he has been a part of.

Conclusion:

In conclusion, Takashi Yokoyama's exceptional talent, dedication to innovation, and collaborative spirit have established him as a pioneering inventor shaping the future of technology. His numerous patents, career achievements, and impactful collaborations underscore his significant contributions to the field, leaving a lasting legacy that will continue to inspire inventors for years to come.

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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