Yotsukaido, Japan

Takashi Yasuhara

This inventor holds 24 USPTO granted patents and 3 published patent applications and 5 EPO patents, primarily in Rotating Electric Machines. Top assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd., Other. Active years: 1982-2013.

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

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

USPTO Granted Patents = 24 

% Patents Active = 54.2


Average Co-Inventor Count = 4.6

ph-index = 10

Forward Citations = 248(Granted Patents)


Location History:

  • Yotsukaidomachi, JP (1982)
  • Tokyo, JP (2006 - 2009)
  • Yotsukaido, JP (2003 - 2013)

Company Filing History:


Years Active: 1982-2013

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Areas of Expertise:
Powdered-Iron Magnet
Permanent Magnet
Rotating Machine
Inverter-Driven
Sintered Magnet
Dynamo-Electric Machine
Electric Vehicle
Winding Machine
Coil Assembly
High-Temperature Load
24 patents (USPTO):Explore Patents

Title: Innovations by Takashi Yasuhara: A Pioneer in Electric Machine Technology

Introduction: Takashi Yasuhara, based in Yotsukaido, Japan, is a distinguished inventor with an impressive portfolio of 24 patents. His contributions to the field of electric machines have paved the way for advancements in both efficiency and functionality in various applications, particularly in electric vehicles.

Latest Patents: Among Yasuhara's latest patents, two notable inventions stand out. The first is a "Rotating Electric Machine Having Rotor Embedded-Permanent-Magnets with Inner-End Magnetic Gaps and Outer-End Magnetic Gaps." This innovation features a permanent magnet rotating electric machine that includes a stator with windings wrapped around a stator iron core and a rotor embedded with alternating polarity permanent magnets. The design optimizes efficiency by reducing iron loss and enhances performance in electric vehicles using this advanced electric machine.

The second patent, titled "Powdered-Iron Magnet and Rotating Machine Using the Same," focuses on the development of a high-resistance magnet that can be molded at low temperatures, including room temperature. This magnet uses a blend of magnetic powders and softer metallic powders, along with a fluorine compound high-resistance layer that enhances its performance.

Career Highlights: Throughout his career, Yasuhara has contributed significantly to notable companies, particularly Hitachi, Ltd. His innovations have not only advanced technology but have also improved energy efficiency in machines, aligning with the global push towards sustainable energy solutions.

Collaborations: Yasuhara has collaborated with other talented professionals in the industry, including Yutaka Matsunobu and Fumio Tajima. These collaborations have fostered the sharing of ideas and expertise, leading to groundbreaking advancements in electric machine technology.

Conclusion: Takashi Yasuhara's innovations in electric machines exemplify the spirit of modern engineering and invention. His work continues to influence the landscape of electric vehicles and energy-efficient designs, securing his place as a key player in the field. With a remarkable record of patents and collaborations, Yasuhara remains a pivotal figure in advancing electric machine technology.

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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