Location History:
- Steventon, Abingdon, Oxfordshire, GB (1981)
- Abingdon, GB (1981 - 1982)
Company Filing History:
2 out of 2 
1 out of 832,812 Years Active: 1981-1982
Title: Innovations of John D McCann
Introduction
John D McCann is a notable inventor based in Abingdon, GB. He has made significant contributions to the field of surveillance technology, holding a total of 3 patents. His work focuses on enhancing security systems through innovative designs and methodologies.
Latest Patents
One of McCann's latest patents is 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 radiated from opposite sides of the zone. A receptor reradiator in the zone receives these signals and reradiates a reply signal to a receiver. This reply signal consists of the microwave carrier signal amplitude modulated according to the instantaneous value of the low-frequency fields at the location of the receptor reradiator. The receiver is designed to separate out preselected intermodulation products and activates an alarm only when these products are present.
Another significant patent is a detection system for monitoring the position of a receptor reradiator within a surveillance zone. This system includes a means for transmitting a first signal through the zone, and the receptor reradiator responds by radiating at least one reply signal that is a function of the first signal and its position in the zone. The receiver receives the reply signal and indicates the position of the receptor reradiator, with an alarm that can be triggered based on the reply signals.
Career Highlights
Throughout his career, John D McCann has worked with various companies, including Parmeko Limited. His experience in the industry has allowed him to develop and refine his innovative ideas, leading to the successful patenting of his inventions.
Collaborations
McCann has collaborated with notable individuals such as James H Stephen and Michael A Flemming. These partnerships have contributed to the advancement of his projects and the successful implementation of his inventions.
Conclusion
John D McCann's contributions to surveillance technology through his innovative patents demonstrate his expertise and commitment to enhancing security systems. His work continues to influence the field and showcases the importance of innovation in technology.