This inventor holds 1 USPTO granted patent. Top assignee: Toto Ltd.. Active years: 1985.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1985
Title: Shigefumi Yasunaga and His Instantaneous Gas Water Heater Invention.
Introduction
Shigefumi Yasunaga is an inventor associated with Toto Ltd. in Shiga, Japan. His recorded patent concerns an instantaneous gas water heater designed to regulate hot-water temperature and help protect the system from freezing.
Latest Patents
Yasunaga’s listed patent, “Instantaneous Gas Water Heater,” describes a control system that adjusts gas and combustion-air supply based on water flow, incoming water temperature, and the selected hot-water temperature. A sensor measures the temperature of the water leaving the heater and sends feedback to the control unit, which adjusts a valve to help achieve the desired temperature. The invention also describes heaters and thermostat-based controls intended to prevent freezing in the heat exchanger and water pipes. Yasunaga is credited with 1 patent in the information provided.
Career Highlights
The available information connects Yasunaga’s inventive work with Toto Ltd. and highlights his contribution to water-heating technology. The patent focuses on coordinated temperature regulation, fuel control, and freeze prevention.
Collaborations
Osamu Tsutsui and Hidehiko Kuwahara are identified as Yasunaga’s coworkers. The provided information does not specify their roles in the patent.
Conclusion
Shigefumi Yasunaga’s recorded invention combines responsive temperature control with measures to prevent freezing, addressing practical challenges in instantaneous gas water heaters.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile