Tokyo, Japan

Yoshiaki Koizumi

This inventor holds 84 USPTO granted patents and 19 published patent applications, plus 2 CIPO patents and 46 EPO patents, primarily in Information Processing (CPC class G06F3-0338). Top assignees: Mitsubishi Electric Corporation, Nintendo Co., Ltd., Mitsubishi Denki Kabushiki Kaisha. Active years: 2000-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshiaki Koizumi. Retrieved from https://idiyas.com/inventor/yoshiaki-koizumi

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

USPTO Granted Patents = 84 

% Patents Active = 66.7

 

 

Average Co-Inventor Count = 3.3

ph-index = 12

Forward Citations = 496(Granted Patents)

Forward Citations (Not Self Cited) = 486(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Chiyoda-ku, JP (2012 - 2015)
  • Kyoto, JP (2000 - 2024)
  • Tokyo, JP (2004 - 2024)

Company Filing History:


Years Active: 2000-2025

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Areas of Expertise:
Player Interactions
Virtual Game Space
Air-Conditioning System
Touch Panel
Communication Apparatus
Signal Transfer
Electric Equipment Management
Relay Device
Networked System
Current Measurement
Lighting Control
Presence Detection
84 patents (USPTO):Explore Patents

Title: The Innovative Contributions of Yoshiaki Koizumi

Introduction: Yoshiaki Koizumi is a prominent inventor based in Tokyo, Japan, known for his contributions to the field of air conditioning and refrigeration technology. With an impressive portfolio of 55 patents, Koizumi has made significant advancements that enhance the performance and functionality of air-conditioning systems. His inventive spirit and dedication to innovation continue to influence the industry.

Latest Patents: Yoshiaki Koizumi's recent patents include a state analyzer system and a state analysis device. This technology features a specific state determination unit that identifies state information relevant to refrigerants within refrigeration circuits. Additionally, a normal region determination unit defines a normal operating space where this specific state information resides during typical air conditioning operations. His air-conditioning apparatus patent integrates an outdoor unit and an indoor unit that work in tandem with a refrigerant circuit. This system is equipped with sensors to monitor temperature states and includes a sophisticated remote control with microcomputing capabilities. This innovative approach enables the detection of issues within the system, estimates potential causes of trouble, and utilizes a neural network for enhanced accuracy in troubleshooting and operational efficiency.

Career Highlights: Throughout his distinguished career, Yoshiaki Koizumi has worked with leading companies such as Mitsubishi Electric Corporation and Mitsubishi Denki Kabushiki Kaisha. His tenure at these organizations has enabled him to apply his innovative thinking and engineering skills, resulting in the development of several cutting-edge technologies.

Collaborations: In the pursuit of his groundbreaking work, Koizumi has collaborated with notable professionals like Noriyuki Kushiro and Toshiyasu Higuma. These collaborations have contributed to the advancement of air conditioning technologies, leading to more efficient and intelligent systems.

Conclusion: Yoshiaki Koizumi's contributions to refrigeration and air-conditioning technology demonstrate his commitment to innovation and excellence. With numerous patents to his name, he continues to shape the industry and inspire future generations of inventors. His work not only reflects a deep understanding of technical challenges but also underscores the potential of innovative thinking in solving real-world problems.

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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