Kawaguchi, Japan

Koji Arai

This inventor holds 31 USPTO granted patents, primarily in Image Processing Technology. Top assignees: Canon Kabushiki Kaisha, Fujitsu Corporation, Dai Nippon Printing Co., Ltd.. Active years: 1994-2013.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Koji Arai. Retrieved from https://idiyas.com/inventor/koji-arai-qacu8lfm

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

Calculating rank

% Patents Active = 61.3

Average Co-Inventor Count = 2.6

ph-index = 10

Forward Citations = 389(Granted Patents)


Location History:

  • Ohmiya, JP (2002 - 2004)
  • Saitama, JP (2006)
  • Shinjuku-Ku, JP (2003 - 2008)
  • Tokyo-To, JP (2003 - 2011)
  • Kawasaki, JP (1994 - 2013)
  • Kawaguchi, JP (1998 - 2013)

Company Filing History:


Years Active: 1994-2013

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Areas of Expertise:
Image Processing
Transceiver Apparatus
Wireless Communication
Color Filter
Electroluminescent Device
Dimming Control
Subscriber Radio Access
Net Shopping Method
Printing Apparatus
Wettability Changing Layer
Communication Method
Facsimile Apparatus
31 patents (USPTO):Explore Patents

Title: The Innovative Contributions of Koji Arai

Introduction: Koji Arai, an accomplished inventor based in Kawaguchi, Japan, holds an impressive portfolio of 31 patents. His groundbreaking work in technology, particularly in wireless systems and manufacturing processes, has positioned him as a notable figure in the field of innovation.

Latest Patents: Among his latest contributions, Arai developed a “Transmission level control method and transceiver apparatus in wireless local loop system.” This innovation addresses the management of transmission levels to prevent excessive signal strength. The method involves generating a required reception level tailored to different data classifications, detecting the current reception level, calculating the level difference, and adjusting the transmission level accordingly.

Another significant patent is the “Color filter and method for manufacturing color filter.” This innovation allows for the production of color filters via a simplified process, which avoids the risk of short-circuiting electrodes on a thin-film transistor (TFT) substrate. The filter consists of a substrate and layers of red, green, and blue colors, with specific lamination techniques that enhance functionality and performance.

Career Highlights: Arai's professional journey includes strategic roles at prominent companies such as Canon and Fujitsu. His tenure at these organizations has been marked by a commitment to advancing technology through innovative solutions, contributing significantly to their research and development efforts.

Collaborations: Throughout his career, Arai has worked alongside talented individuals, including Shoichi Sato and Eiichi Motoyama. These collaborations have not only fostered a robust exchange of ideas but also led to substantial advancements in their respective fields.

Conclusion: Koji Arai's contributions to technology through his patents underscore his role as a vital innovator. His work in wireless communication and manufacturing processes illustrates the impact of dedicated inventors in shaping the future of technology. With continued innovation, Arai remains an influential figure in the industry.

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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