Tokyo, Japan

Keisuke Hirai

This inventor holds 4 USPTO granted patents and 1 published patent application. Top assignees: Hirai Engineering Corporation, Faco Corporation Ltd.. Active years: 1988-1998.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keisuke Hirai. Retrieved from https://idiyas.com/inventor/keisuke-hirai-6cg5biy9

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

Calculating rank
USPTO Granted Patents = 4 

% Patents Active = 100.0

Average Co-Inventor Count = 1.6

ph-index = 3

Forward Citations = 225(Granted Patents)


Company Filing History:


Years Active: 1988-1998

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4 patents (USPTO):Explore Patents

Title: Keisuke Hirai: Innovator in Solar Technology

Introduction

Keisuke Hirai is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of solar technology, holding a total of 4 patents. His innovative designs focus on enhancing the efficiency and functionality of solar energy systems.

Latest Patents

One of his latest patents is a roof system utilizing a solar cell. This system comprises a first modular roof member made up of several first light collecting plate segments, each embedded with a solar cell. These segments are aligned in one direction, with additional segments aligned perpendicularly. The second modular roof member consists of second light collecting plate segments, equal in size to the first, but with a greater number of segments in one direction, enhancing the overall energy collection capability.

Career Highlights

Keisuke has worked with prominent companies such as Hirai Engineering Corporation and Faco Corporation Ltd. His experience in these organizations has allowed him to refine his skills and contribute to various innovative projects in the solar technology sector.

Collaborations

He has collaborated with his coworker, Takashi Hirai, to further advance their projects and share insights in the field of solar energy.

Conclusion

Keisuke Hirai's work in solar technology exemplifies the innovative spirit of modern inventors. His patents and career achievements reflect a commitment to advancing renewable energy solutions.

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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