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For the Inventor, By the Inventor

Osaka, Japan

Koichi Kojima

This inventor holds 9 USPTO granted patents. Top assignee: Matsushita Electric Industrial Co., Ltd.. Active years: 1987-2006.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Koichi Kojima. Retrieved from https://idiyas.com/inventor/koichi-kojima-braoif5o

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

USPTO Granted Patents = 9

% Patents Active = 66.7

Average Co-Inventor Count = 4.0

ph-index = 5

Forward Citations = 73(Granted Patents)


Location History:

  • Hirakata, JP (2000 - 2003)
  • Odawara, JP (2005)
  • Osaka, JP (1987 - 2006)

Company Filing History:

goldMedal9 out of 27,375 
 
Matsushita Electric Industrial Co., Ltd.
 patents

Years Active: 1987-2006

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9 patents (USPTO):Explore Patents
1. 7049679 - Capacitor and production method therefor (2006-05-23),
2. 6985353 - Anode body for solid electrolytic capacitor and solid electrolytic capacitor using the same (2006-01-10),
3. 6878173 - Method for manufacturing electrode plate for cell (2005-04-12),
4. 6678149 - Solid electrolytic capacitor and method of manufacturing the capacitor (2004-01-13),
5. 6522527 - Anode member for a solid electrolytic capacitor, an electrolytic capacitor using the same, and a method of making the same (2003-02-18),
6. 6510045 - Solid electrolyte capacitor (2003-01-21),
7. 6466430 - Capacitor (2002-10-15),
8. 6096184 - Method of manufacturing aluminum foil for aluminum electrolytic capacitor (2000-08-01),
9. 4681672 - Method for etching electrode foils for an aluminium electrolytic (1987-07-21),

Title: Koichi Kojima: Innovator in Solid Electrolytic Capacitors

Introduction

Koichi Kojima is a prominent inventor based in Osaka, Japan, known for his significant contributions to the field of solid electrolytic capacitors. With a total of nine patents to his name, Kojima has made remarkable advancements in capacitor technology, enhancing their efficiency and performance.

Latest Patents

Kojima's latest patents include innovative designs for solid electrolytic capacitors. One notable patent describes a solid electrolytic capacitor that utilizes a sintered metal as an anode and a silver layer as a cathode. This design features a sintered metal made of tantalum with an open porosity ratio exceeding 75%. The process involves oxidizing the surface of the sintered metal to deposit an oxide film made of tantalum pentoxide. The cavities within the metal are filled with an electrically conductive material, and the metal is then shaped around a lead wire. This design allows for a large capacity due to the significant surface area of the sintered metal. Another patent focuses on an anode body for solid electrolytic capacitors, which boasts reduced leakage current and improved equivalent series resistance (ESR) characteristics. This is achieved by minimizing defects in the dielectric film of the anode body, utilizing a valve metal foil and a sintered layer that covers the foil's surfaces.

Career Highlights

Kojima has spent a significant portion of his career at Matsushita Electric Industrial Co., Ltd., where he has been instrumental in developing cutting-edge capacitor technologies. His work has not only advanced the capabilities of solid electrolytic capacitors but has also contributed to the overall progress in electronic components.

Collaborations

Throughout his career, Kojima has collaborated with notable colleagues, including Yuji Mido and Tetsuhiro Korechika. These partnerships have fostered a creative environment that has led to innovative solutions in capacitor design and manufacturing.

Conclusion

Koichi Kojima's contributions to the field of solid electrolytic capacitors have established him as a key figure in the industry. His innovative patents and collaborative efforts continue to influence advancements in electronic components, showcasing the importance of research and development in 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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