Tokyo, Japan

Koji Yamanaka

This inventor holds 71 USPTO granted patents and 7 published patent applications, plus 1 CIPO patent and 13 EPO patents, primarily in Semiconductor Devices (CPC class H03F). Top assignees: Organo Corporation, Mitsubishi Electric Corporation, Nec Corporation. Active years: 1993-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Koji Yamanaka. Retrieved from https://idiyas.com/inventor/koji-yamanaka

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

USPTO Granted Patents = 71 

% Patents Active = 85.9


 

Average Co-Inventor Count = 3.2

ph-index = 12

Forward Citations = 431(Granted Patents)

Forward Citations (Not Self Cited) = 405(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Saitama, JP (1997 - 1998)
  • Toda, JP (1998)
  • Saitama-ken, JP (1999)
  • Satama, JP (2000 - 2001)
  • Akou, JP (2007 - 2009)
  • Koto-ku, JP (2013)
  • Chiyoda-ku, JP (2018)
  • Shizuoka, JP (2020)
  • Tokyo, JP (1993 - 2024)

Company Filing History:


Years Active: 1993-2026

Loading Chart...
Loading Chart...
Loading Chart...
Areas of Expertise:
Charge Sensor
Conductivity Measurement
Substrate Treatment
Distributed Amplifier
Power Amplifier
High-Frequency Switch
Doherty Amplifier
Multi-Stage Amplifier
Transistor Manufacturing
Ozone Water Supply
Organic Solvent Purification
Broadband Amplifier
71 patents (USPTO):Explore Patents

Title: Innovations of Koji Yamanaka: A Pioneer in Substrate Treatment and Conductivity Measurement

Introduction

Koji Yamanaka, based in Tokyo, Japan, is a renowned inventor with an impressive portfolio of 67 patents. His contributions to the fields of conductivity measurement and substrate treatment have significantly advanced technological applications.

Latest Patents

Among his most recent innovations is a method and system for measuring the conductivity of decationized water. This invention enhances efficiency by reducing the time required for a conductivity meter to be ready for use after the initiation of an electric decationizing process. The process involves supplying water with cations and anions to an electric decationizing apparatus while applying an initial voltage, producing decationized water. Prior to applying the first voltage, a second, lower voltage is administered to enhance the readiness of the apparatus, thus streamlining the measurement process.

Additionally, Yamanaka has developed a substrate treatment method and equipment aimed at minimizing corrosion or oxidation of metal wiring exposed on substrate surfaces. This innovative apparatus includes a treatment chamber for substrate placement and an inert gas filling mechanism. The system also features a catalytic unit filled with a platinum-group metal catalyst, through which hydrogen-dissolved water is passed and utilized in the substrate treatment solution.

Career Highlights

Throughout his distinguished career, Koji Yamanaka has held prominent positions at well-respected companies, including Organo Corporation and Mitsubishi Electric Corporation. His work at these organizations has contributed significantly to his knowledge and expertise in the field, facilitating his innovative spirit and patent achievements.

Collaborations

Yamanaka has collaborated with notable peers in the industry, including Hiroshi Inoue and Yukinari Yamashita. These partnerships have fostered a rich environment for shared ideas and technological advancements, furthering progress in their respective fields.

Conclusion

Koji Yamanaka’s inventive spirit and dedication to innovation are evident through his extensive patent portfolio. His groundbreaking work on conductivity measurement and substrate treatment technology continues to have a profound impact in various sectors, showcasing his status as a leading inventor in Japan and beyond.

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]
Loading…