Oyama, Japan

Naohisa Higashiyama

This inventor holds 42 USPTO granted patents and 10 published patent applications and 1 EPO patent, primarily in Heat Exchanger Technology. Top assignees: Showa Denko K.k., Keihin Thermal Technology Corporation, Showa Aluminum Corporation. Active years: 2000-2020.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Naohisa Higashiyama. Retrieved from https://idiyas.com/inventor/naohisa-higashiyama

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

USPTO Granted Patents = 42 

% Patents Active = 35.7


Average Co-Inventor Count = 1.4

ph-index = 8

Forward Citations = 199(Granted Patents)


Location History:

  • Tochigiken, JP (2001)
  • Tochigi, JP (2000 - 2006)
  • Oyama, JP (2005 - 2020)

Company Filing History:


Years Active: 2000-2020

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Areas of Expertise:
Heat Exchanger
Evaporator
Cooling Unit
Thermal Storage
Refrigeration Cycle
Layered Heat Exchanger
Vehicle Air Conditioning
Double-Wall Tube
Joint Plate
Heat Exchanger Design
Inlet Guide
Drain Grooves
42 patents (USPTO):Explore Patents

Title: Innovations of Naohisa Higashiyama: A Pioneer in Refrigeration Technology

Introduction

Naohisa Higashiyama, based in Oyama, Japan, is a prolific inventor with a total of 42 patents to his name. His work primarily focuses on advancements in refrigeration technology, demonstrating a commitment to enhancing efficiency and functionality in cooling systems.

Latest Patents

Among his latest innovations are two significant patents:

1. **Condenser with Liquid Receiver** – This invention features a liquid receiver designed to improve the functionality of condensers. The design includes a main body with refrigerant inflow and outflow holes, ensuring effective refrigerant flow between condensation and supercooling sections. The flow passage has been meticulously structured to optimize the refrigerant movement, enhancing the overall efficiency of the system.

2. **Evaporator** – This patent details an evaporator that incorporates a dual descending flow tube group, strategically designed for windward positioning to optimize heat exchange. The invention includes a flow distribution control section that regulates refrigerant passages between compartments, enhancing performance over conventional designs.

Career Highlights

Naohisa Higashiyama has had a notable career, working with prominent companies such as Showa Denko K.K. and Keihin Thermal Technology Corporation. His contributions to these organizations reflect a strong dedication to innovation in the field of thermal technology, showcasing his skills as an accomplished inventor.

Collaborations

Throughout his career, Higashiyama has collaborated with various talented individuals, including notable coworkers like Osamu Kamoshida and Motoyuki Takagi. These collaborations have fostered a creative environment, enabling the development of groundbreaking inventions in refrigeration technology.

Conclusion

Naohisa Higashiyama stands out as a significant figure in the realm of refrigeration technology, with a wealth of patents that reflect his innovative spirit. His pioneering work not only pushes the boundaries of what is possible in cooling systems but also sets a benchmark for future developments 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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