Fukuoka, Japan

Keiji Hayashi

This inventor holds 5 USPTO granted patents. Top assignee: Toto Ltd.. Active years: 1988-1990.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keiji Hayashi. Retrieved from https://idiyas.com/inventor/keiji-hayashi-0yepencc

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

Calculating rank

% Patents Active = 100.0

Average Co-Inventor Count = 5.9

ph-index = 5

Forward Citations = 136(Granted Patents)


Location History:

  • Kitakyushu, JP (1988)
  • Fukuoka, JP (1988 - 1990)

Company Filing History:


Years Active: 1988-1990

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5 patents (USPTO):Explore Patents

Title: Keiji Hayashi: Innovator in Gas Water Heating Technology

Introduction

Keiji Hayashi is a prominent inventor based in Fukuoka, Japan. He has made significant contributions to the field of gas water heating technology. With a total of 5 patents to his name, Hayashi has demonstrated his expertise and innovative spirit in developing advanced heating solutions.

Latest Patents

One of Hayashi's latest inventions is a multiple-purpose instantaneous gas water heater. This innovative device features a combination of a larger combustion capacity type first burner and a smaller combustion capacity type second burner. Each burner can be controlled using a proportional combustion control method and/or an intermittent combustion control method. The integration of these functions within a microcomputer system allows for selective use of each burner or both together. This flexibility enables users to select water from a wide range of hot water temperatures or to set a specific target temperature.

Career Highlights

Hayashi is currently employed at Toto Ltd., a leading company in the manufacturing of sanitary ware and bathroom products. His work at Toto Ltd. has allowed him to focus on developing cutting-edge technologies that enhance the efficiency and functionality of gas water heaters.

Collaborations

Throughout his career, Hayashi has collaborated with notable colleagues, including Osamu Tsutsui and Shingo Tanaka. These partnerships have contributed to the successful development of innovative products in the heating technology sector.

Conclusion

Keiji Hayashi's contributions to gas water heating technology exemplify his commitment to innovation and excellence. His patents reflect a deep understanding of user needs and technological advancements. Hayashi continues to be a key figure in the evolution of efficient heating 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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