Company Filing History:
6 out of 1,259 
1 out of 2,043 
2 out of 832,680 Years Active: 1989-2002
Title: Hugh Duffy: Innovator in Circuit Protection
Introduction
Hugh Duffy is an accomplished inventor based in Cupertino, California, known for his significant contributions to circuit protection technologies. With a total of nine patents, Duffy has made substantial advancements in electrical safety devices, impacting various electronic applications.
Latest Patents
Hugh Duffy's most recent inventions demonstrate his innovative approach to circuit protection. His patent on frequency-selective circuit protection arrangements presents a modification of the conventional ground fault circuit interrupter (GFCI). This enhancement involves a control element in series with the line path, alongside a bypass element in parallel. Under normal conditions, the bypass element remains inactive, but it activates when a specific frequency component of the current triggers a current imbalance, effectively forcing the GFCI to trip.
Another significant patent led by Duffy is the two-terminal transistor PTC circuit protection device. This invention offers a compact and lightweight solution, making it ideal for portable electronics and high-density electronic circuits. The design encompasses a positive coefficient temperature (PTC) element connected to a bipolar transistor, promoting efficient thermal coupling and space-saving integration.
Career Highlights
Hugh Duffy has demonstrated his expertise while working with notable companies, including Raychem Limited. His work focuses on improving electrical safety and efficiency within various devices, establishing him as a key figure in the circuit protection field.
Collaborations
Throughout his career, Duffy has collaborated with respected professionals such as Brian Thomas and John A. Midgley. Their collective efforts have contributed to groundbreaking advancements in circuit technologies, showcasing the power of teamwork in innovation.
Conclusion
Hugh Duffy’s work exemplifies the intersection of creativity and engineering, particularly in the realm of circuit protection. Through his innovative patents, collaborations, and professional journey, he continues to influence the field, ensuring a safer and more efficient electronic landscape.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.