This inventor holds 3 USPTO granted patents. Top assignees: Electric Power Research Institute Incorporated, Knogo Corporation, University of Pennsylvania. Active years: 1977-1994.
Company Filing History:
1 out of 994 
1 out of 32 
1 out of 2,651 
Years Active: 1977-1994
Title: The Innovations of Charles D. Graham
Introduction
Charles D. Graham is a notable inventor based in Ardmore, PA (US). He has made significant contributions to the field of technology, particularly in magnetic materials and electronic article surveillance systems. With a total of 3 patents, Graham's work has had a lasting impact on various industries.
Latest Patents
Graham's latest patents include a "Multiple pulse responder and detection system and method of making" and an "Amorphous alloy with high magnetic induction at room temperature." The first patent describes a responder for electronic article surveillance apparatus, which is created by subjecting multiple magnetizable elements to heating in the presence of a magnetic field. This process allows for different magnetic characteristics, enabling the responder to produce spaced apart pulses when subjected to a cyclically varying magnetic interrogation field. The second patent details an amorphous alloy composed of iron, carbon, and boron, which exhibits exceptional magnetic induction properties at room temperature. This alloy is particularly suitable for use as the core of a power transformer, with specific atomic percentages of its components outlined in the patent.
Career Highlights
Throughout his career, Graham has worked with reputable organizations such as the Electric Power Research Institute and the University of Pennsylvania. His experience in these institutions has allowed him to develop and refine his innovative ideas, contributing to advancements in technology.
Collaborations
Graham has collaborated with notable individuals in his field, including Takeshi Egami and Shinichiro Hatta. These partnerships have fostered a creative environment that has led to groundbreaking inventions.
Conclusion
Charles D. Graham's contributions to the field of technology through his patents and collaborations highlight his innovative spirit and dedication to advancing magnetic materials and electronic systems. His work continues to influence the industry and inspire future inventors.