Location History:
- Abingdon, Oxfordshire, GB (1981)
- Abingdon, GB (1982 - 1988)
Company Filing History:
1 out of 2 
1 out of 407 
1 out of 832,812 Years Active: 1981-1988
Title: The Innovations of James H Stephen
Introduction
James H Stephen is a notable inventor based in Abingdon, GB. He has made significant contributions to the field of electronic devices and surveillance systems. With a total of three patents to his name, his work reflects a commitment to advancing technology.
Latest Patents
One of his latest patents is focused on substrates for electronic devices. This invention involves a substrate made of an aluminum-bearing ferritic steel, which is coated with a material that possesses high dielectric strength, low dielectric constant, and a coefficient of thermal expansion that closely matches that of the steel lamina. Another significant patent is for a surveillance system that transmits a microwave carrier signal through a designated surveillance zone. This system establishes two low-frequency energy fields produced by pairs of closely spaced low-frequency signals. A receptor reradiator in the zone receives these signals and reradiates a reply signal to a receiver, which activates an alarm only when specific intermodulation products are detected.
Career Highlights
Throughout his career, James H Stephen has worked with various companies, including Parmeko Limited. His innovative approach and technical expertise have allowed him to develop groundbreaking technologies that enhance electronic and surveillance systems.
Collaborations
James has collaborated with notable individuals in his field, including John D McCann and Michael A Flemming. These partnerships have contributed to the successful development of his patents and innovations.
Conclusion
James H Stephen's contributions to technology through his patents demonstrate his expertise and innovative spirit. His work continues to influence the fields of electronic devices and surveillance systems.