Kusatsu, Japan

Akio Yamagiwa

This inventor holds 16 USPTO granted patents and 5 published patent applications, plus 1 CIPO patent and 8 EPO patents. Top assignees: Daikin Industries, Ltd., Daiken Industries, Ltd.. Active years: 1998-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Akio Yamagiwa. Retrieved from https://idiyas.com/inventor/akio-yamagiwa

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

USPTO Granted Patents = 16 

% Patents Active = 93.8


 

Average Co-Inventor Count = 2.7

ph-index = 6

Forward Citations = 141(Granted Patents)


Location History:

  • Osaka, JP (2014)
  • Kusatsu, JP (1998 - 2016)
  • Shiga, JP (2013 - 2017)

Company Filing History:


Years Active: 1998-2025

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16 patents (USPTO):Explore Patents

Title: Akio Yamagiwa: Innovator in Rotor Technology

Introduction

Akio Yamagiwa is a prominent inventor based in Kusatsu, Japan. He has made significant contributions to the field of rotor technology, holding a total of 16 patents. His innovative designs have advanced the efficiency and functionality of rotary electric machines.

Latest Patents

Yamagiwa's latest patents include a rotor with permanent magnets having different coercive forces. This rotor features an iron core and a series of permanent magnets housed in magnet slots, which are arranged magnetically in series. Additionally, a flux barrier is provided to enhance the magnetic performance of the rotor. Another notable patent is for a rotor and rotary electric machine that includes a first rotor core with gaps penetrating through it, along with a second rotor core that has magnet-housing slots. This design optimizes magnetic resistance and improves overall efficiency.

Career Highlights

Throughout his career, Akio Yamagiwa has worked with notable companies such as Daikin Industries, Ltd. and Daiken Industries, Ltd. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking innovations in rotor technology.

Collaborations

Yamagiwa has collaborated with esteemed colleagues, including Yoshiki Yasuda and Keiji Aota. These partnerships have fostered a creative environment that has led to the development of advanced technologies in the field.

Conclusion

Akio Yamagiwa's contributions to rotor technology and his impressive portfolio of patents highlight his role as a leading inventor in the industry. His work continues to influence advancements in rotary electric machines, showcasing the importance of innovation in engineering.

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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