Hitachi, Japan

Tomoyuki Ogawa

This inventor holds 52 USPTO granted patents and 9 published patent applications, plus 2 CIPO patents and 6 EPO patents, primarily in Antenna Technology. Top assignees: Hitachi Metals, Ltd., Shionogi Company Limited, Hitachi Cable, Inc.. Active years: 2004-2025.

USPTO Granted Patents = 52 

% Patents Active = 44.2


 

Average Co-Inventor Count = 2.7

ph-index = 4

Forward Citations = 68(Granted Patents)

Forward Citations (Not Self Cited) = 67(Dec 10, 2025)


Location History:

  • Hitachi, JP (2008 - 2018)
  • Toyonaka, JP (2018)
  • Matsudo, JP (2019)
  • Tokyo, JP (2017 - 2020)
  • Osaka, JP (2004 - 2023)

Company Filing History:


Years Active: 2004-2025

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Areas of Expertise:
Antenna Device
Electrostatic Toner
Heterocyclic Derivatives
Phase Shifter
Mobile Communication
Power Feed Circuit
Bicyclic Nitrogen Compounds
Pharmaceutical Composition
Signal Line
Dielectric Members
Triplate Line
Image Developing Toner
52 patents (USPTO):Explore Patents

Title: The Innovations of Tomoyuki Ogawa: A Pioneer in Hybrid Circuits

Introduction

Tomoyuki Ogawa, based in Hitachi, Japan, stands out as a prolific inventor with an impressive portfolio of 29 patents. His contributions to the field of hybrid circuits have paved the way for significant advancements in technology and telecommunications.

Latest Patents

Ogawa's recent innovations include a groundbreaking 90-degree hybrid circuit that incorporates a dielectric substrate. This circuit features a unique design with a first conductor and a second conductor that electrically connect various ports. His design also includes coupled lines that enable efficient signal transmission. Another notable invention is a power feed circuit intended for antenna devices. This circuit effectively manages power distribution among multiple antenna elements, ensuring balanced signal output and improving overall performance.

Career Highlights

Throughout his career, Ogawa has worked with renowned companies such as Hitachi Metals Ltd. and Hitachi Cable, Inc., where he has applied his skills in developing cutting-edge technology in hybrid circuits and telecommunications. His innovative designs have not only contributed to his companies but have also set benchmarks in the industry, showcasing the importance of intellectual property in technological advancement.

Collaborations

Ogawa has collaborated with notable colleagues including Naoki Iso and Nobuaki Kitano, further enhancing the collaborative spirit of innovation within his work environment. These partnerships have likely facilitated the blending of ideas and expertise, leading to the creation of more effective and refined technologies.

Conclusion

In summary, Tomoyuki Ogawa's achievements highlight the integral role of inventors in driving innovation. His work on hybrid circuits and power feed technologies underscores the value of patents in protecting groundbreaking ideas that shape the future of technology. With each new invention, Ogawa continues to contribute to the advancement of his field, inspiring future generations of inventors.

Profile summary based on public USPTO records.
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