Shiga, Japan

Shusaku Murakami

This inventor holds 1 USPTO granted patent. Top assignee: Toto Ltd.. Active years: 1985.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shusaku Murakami. Retrieved from https://idiyas.com/inventor/shusaku-murakami

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 = 4.0

ph-index = 1

Forward Citations = 24(Granted Patents)


Company Filing History:


Years Active: 1985

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1 patent (USPTO):Explore Patents

Title: Shusaku Murakami and Instantaneous Water-Heating Technology.

Introduction

Shusaku Murakami is an inventor associated with Shiga, Japan, and Toto Ltd. His recorded patent work concerns an instantaneous gas water heater designed to regulate hot-water temperature while helping protect the system from freezing.

Latest Patents

Murakami is associated with 1 patent, titled “Instantaneous Gas Water Heater.” The invention uses water-flow and incoming-water-temperature sensors to provide signals to a control unit, which calculates the gas supply needed to heat water to the selected temperature. The system also adjusts combustion air through a fan damper and uses feedback from an outlet-temperature sensor to regulate the hot-water supply.

To help prevent freezing in winter, the design uses a thermostat signal to activate a heater in the air-supply chamber, warming the heat-exchanger pipe. Additional heaters in the water-feeding and hot-water-supply pipes are also controlled to protect those parts of the system.

Career Highlights

The patent reflects work on coordinated temperature control, gas and air regulation, and freeze prevention in an instantaneous water heater. Murakami’s recorded company affiliation is Toto Ltd.

Collaborations

The patent lists Hidehiko Kuwahara and Shigefumi Yasunaga as coworkers.

Conclusion

Shusaku Murakami’s recorded invention combines sensor-based heating control with winter freeze protection, addressing both hot-water temperature regulation and system reliability.

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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