Munhall, PA, United States of America

Thomas J Fisher

This inventor holds 1 USPTO granted patent. Top assignee: The United States of America as Represented by the Secretary of. Active years: 1984.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Thomas J Fisher. Retrieved from https://idiyas.com/inventor/thomas-j-fisher-ehyuvgxx

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 = 5.0

ph-index = 1

Forward Citations = 35(Granted Patents)


Company Filing History:


Years Active: 1984

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1 patent (USPTO):Explore Patents

Title: Thomas J Fisher - Innovator in Intrinsically Safe Power Supply Technology

Introduction

Thomas J Fisher is a notable inventor based in Munhall, PA (US). He has made significant contributions to the field of electrical engineering, particularly in the development of safety technologies for hazardous environments. His innovative approach has led to the creation of a unique power supply system designed to operate safely in potentially dangerous settings.

Latest Patents

Fisher holds a patent for a "Power supply for an intrinsically safe circuit." This invention employs a binary current interrupter that connects a power source to an electrical load. The design is particularly suited for environments like coal mines, where safety is paramount. The power supply is located at a safe distance, such as on the earth's surface, while the load operates in hazardous conditions. The interrupter features a pass and switching transistor, a current sensor, gating circuitry, a flip-flop switch, and a delay mechanism for the transistor's activation. In the event of an overcurrent or overvoltage, the system ensures that load current ceases to flow, thereby enhancing safety.

Career Highlights

Fisher's career is marked by his dedication to improving safety in electrical systems. His work has been recognized for its innovative approach to addressing the challenges posed by hazardous environments. He is associated with the United States of America as Represented by the Secretary of, where he continues to contribute to advancements in safety technology.

Collaborations

Fisher has collaborated with notable colleagues, including James C Cawley and Michael D DiMartino. Their combined expertise has furthered the development of safety solutions in electrical engineering.

Conclusion

Thomas J Fisher's contributions to the field of intrinsically safe power supply technology exemplify his commitment to innovation and safety. His patent reflects a significant advancement in protecting individuals working in hazardous environments.

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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