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For the Inventor, By the Inventor

Naruto, Japan

Akifumi Yamawaki

This inventor holds 10 USPTO granted patents. Top assignees: Sanyo Electric Co., Ltd., Other. Active years: 1997-2004.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Akifumi Yamawaki. Retrieved from https://idiyas.com/inventor/akifumi-yamawaki

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

Calculating rank
USPTO Granted Patents = 10

% Patents Active = 100.0

Average Co-Inventor Count = 3.2

ph-index = 5

Forward Citations = 46(Granted Patents)


Location History:

  • Itano-gun, JP (1997)
  • Naruto-shi, Tokushima, JP (2003)
  • Naruto, JP (1997 - 2004)

Company Filing History:

goldMedal9 out of 8,782 
 
Sanyo Electric Co., Ltd.
 patents
silverMedal1 out of 834,601 
Other
 patents

Years Active: 1997-2004

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10 patents (USPTO):Explore Patents
1. 6682848 - Alkaline storage battery and process for the production thereof (2004-01-27),
2. 6632568 - NON-SINTERED NICKEL ELECTRODE WITH EXCELLENT OVER-DISCHARGE CHARACTERISTICS, AN ALKALINE STORAGE CELL HAVING THE NON-SINTERED NICKEL ELECTRODE, AND A MANUFACTURING METHOD OF THE NON-SINTERED NICKEL ELECTRODE (2003-10-14),
3. 6368748 - Nickel-metal hydride storage cell having a high capacity and an excellent cycle characteristic and manufacturing (2002-04-09),
4. 6274275 - Alkali storage cell employing a spongelike metal substrate (2001-08-14),
5. 5940946 - Alkali storage cell employing a spongelike metal substrate (1999-08-24),
6. 5702762 - Manufacturing method of an active material suitable for non-sintered (1997-12-30),
7. 5691086 - Nickel active material for use in alkali storage cells and its (1997-11-25),
8. 5688616 - Non-sintered nickel electrode with excellent over-discharge (1997-11-18),
9. 5672447 - Non-sintered nickel electrode with excellent over-discharge (1997-09-30),
10. 5629111 - Nickel electrode active material; a nickel electrode and a nickel alkali (1997-05-13),

Title: Akifumi Yamawaki: Innovator in Alkaline Storage Battery Technology

Introduction

Akifumi Yamawaki is a notable inventor based in Naruto, Japan. He has made significant contributions to the field of alkaline storage batteries, holding a total of 10 patents. His innovative approaches have led to advancements in battery technology, particularly in the efficiency and performance of nickel electrodes.

Latest Patents

Yamawaki's latest patents include a groundbreaking alkaline storage battery and a process for its production. This invention involves a porous metal material filled with an active material slurry, which is dried and rolled to a predetermined thickness. The rolling process stretches the pores formed by a network skeleton, resulting in ellipsoid-shaped pores. The porous metal material is then cut to align the longitudinal direction of the pores with the crosswise direction of the electrode plate. This method is followed by roller treatment, which creates numerous cracks at a small pitch in the direction parallel to the rolling. Another significant patent involves a non-sintered nickel electrode that exhibits excellent over-discharge characteristics. This alkali storage cell includes a nickel electrode with a highly efficient nickel hydroxide active material, ensuring no capacity decrease during over-discharge operations.

Career Highlights

Throughout his career, Akifumi Yamawaki has worked with prominent companies, including Sanyo Electric Co., Ltd. His experience in these organizations has contributed to his expertise in battery technology and innovation.

Collaborations

Yamawaki has collaborated with notable individuals in his field, including Yoshitaka Baba and Motoo Tadokoro. These partnerships have likely fostered a creative environment for developing new technologies.

Conclusion

Akifumi Yamawaki's contributions to alkaline storage battery technology demonstrate his innovative spirit and commitment to advancing energy solutions. His patents reflect a deep understanding of materials and processes that enhance battery performance.

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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