Hitachi, Japan

Takeshi Tokuyama

USPTO Granted Patents = 60 

 

Average Co-Inventor Count = 4.1

ph-index = 10

Forward Citations = 320(Granted Patents)

Forward Citations (Not Self Cited) = 282(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Higashikurume, JA (1977)
  • Hitachinaka, JP (2019 - 2020)
  • Hitachi, JP (2010 - 2021)
  • Ibaraki, JP (2021)
  • Tokyo, JP (2016 - 2024)

Company Filing History:


Years Active: 1977-2025

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Areas of Expertise:
Power Semiconductor Device
Power Module
Power Conversion Device
Inverter Integrated Motor
Electric Power Conversion Apparatus
Semiconductor Module
Cooling Structure
Electrical Drive System
Capacitor Device
Waterproof Electronic Device
Electric Circuit Module
Manufacturing Method
60 patents (USPTO):Explore Patents

Title: **The Innovations of Takeshi Tokuyama: A Closer Look at His Patents and Career**

Introduction

Takeshi Tokuyama, based in Hitachi, Japan, is a remarkable inventor known for his extensive contributions to the field of power conversion technology. With an impressive portfolio of 52 patents, Tokuyama has dedicated his career to innovating solutions that enhance the efficiency and effectiveness of electronic devices.

Latest Patents

Among his recent patents, one notable invention is a **Power Conversion Device**. This invention presents a streamlined design that allows for miniaturization, which includes a power module for switching operations, a smoothing capacitor, and a sophisticated circuit board for control. It also features a housing that neatly accommodates both the power module and the capacitor, with innovative fixing members to secure the components effectively.

Another significant innovation is the **Power Conversion Device and Motor-Integrated Power Conversion Device.** This patent addresses the heat management issues associated with semiconductor modules. It describes a mechanism in which heat generated by the semiconductor is transferred and mitigated through a bus bar module, keeping the connected capacitor cool while improving the overall performance of the device.

Career Highlights

Takeshi Tokuyama has made noteworthy strides in his career while working with esteemed companies such as **Hitachi Automotive Systems, Ltd.** and **Hitachi, Ltd.** His experience in these organizations has significantly shaped his expertise and innovation in power conversion technologies.

Collaborations

Throughout his professional journey, Tokuyama has collaborated with talented colleagues, including Kinya Nakatsu and Toshiya Satoh. These partnerships have likely fostered an environment of creativity and innovation, leading to breakthroughs in their shared field.

Conclusion

Takeshi Tokuyama's dedication to innovation is evident in his numerous patents and impactful career. His advancements in power conversion devices are not only testimony to his skills as an inventor but also highlight the collaborative efforts within his field. As technology continues to evolve, Tokuyama's contributions stand as significant milestones in improving energy efficiency and device performance.

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