Hoi-gun, Japan

Motohiro Yamaguchi

This inventor holds 23 USPTO granted patents and 1 published patent application, primarily in Refrigeration Technology. Top assignees: Denso Corporation, Nippon Soken, Inc., Nippondenso Co., Ltd.. Active years: 1998-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Motohiro Yamaguchi. Retrieved from https://idiyas.com/inventor/motohiro-yamaguchi

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

USPTO Granted Patents = 23 

% Patents Active = 65.2

Average Co-Inventor Count = 3.9

ph-index = 9

Forward Citations = 183(Granted Patents)


Location History:

  • Nishio, JP (1998)
  • Aichi-Pref., JP (2002)
  • Hoi-gun, JP (2001 - 2005)
  • Toyokawa, JP (2015 - 2017)
  • Kariya, JP (2024)

Company Filing History:


Years Active: 1998-2025

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Areas of Expertise:
Air Conditioner
Refrigeration Cycle
Vapor-Compression
Heat Pump
Ejector Cycle
Automotive Climate Control
Cooling System
Carbon Dioxide Refrigerant
Supercritical Cycle
Expansion Energy Recovery
Compressor Design
Battery Cooling
23 patents (USPTO):Explore Patents

Title: Innovations of Motohiro Yamaguchi: A Pioneer in Refrigeration Technology

Introduction: Motohiro Yamaguchi, an accomplished inventor based in Hoi-gun, Japan, holds an impressive portfolio of 22 patents. His work primarily focuses on advancements in refrigeration cycle devices, which are vital for energy efficiency and environmental sustainability in modern technologies.

Latest Patents: Among Yamaguchi's notable inventions is a sophisticated refrigeration cycle device. This device incorporates a heat pump cycle alongside both high-temperature and low-temperature heat medium circuits. The innovation lies in its ability to adjust heat absorption amounts in various heat absorption devices, optimizing efficiency as the refrigerant flow is modulated according to operational demands. Another significant patent is his refrigerant cycle device designed for vehicles. This invention improves comfort by integrating a compressor with enhanced discharge capacity control, noise determination, and load determination features, ensuring quieter operation and better performance under varying thermal loads.

Career Highlights: Yamaguchi has made substantial contributions while working at Denso Corporation, where his innovative spirit drove the development of cutting-edge refrigeration and air conditioning solutions. His inventions are at the forefront of automotive and industrial refrigeration technologies.

Collaborations: Throughout his career, Motohiro Yamaguchi has had the pleasure of collaborating with several talented individuals, including Yasushi Yamanaka and Shin Nishida. These partnerships have supported the growth and implementation of his groundbreaking inventions.

Conclusion: Motohiro Yamaguchi's contributions to refrigeration technology exemplify the fusion of creativity and technical acumen. His ongoing innovations not only enhance efficiency within his industry but also pave the way toward a more sustainable future. As he continues to explore new ideas and refine existing technologies, the impact of his work will undoubtedly resonate within the field for years to come.

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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