Patents by Inventor John Erik Aasted Sørensen

John Erik Aasted Sørensen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of and a system for surveillance of an environment utilising electromagnetic waves
    Patent number: 7088236
    Abstract: A system and method for surveillance of a physical environment. May utilise already installed equipment, such as WLAN for surveillance purposes. This makes the system cost effective to implement. Transmits a first and a second signal. The signals are received by receivers, and the received signals are compared in order to detect a difference in the signals, the difference being caused by a physical change present in the signal path between transmitter(s) and receiver(s). Does not require high spectral purity of the transmitted signals or heavy computations in order to establish that a change has occurred. Suitable for intruder alarm purposes.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: August 8, 2006
    Assignee: IT University of Copenhagen
    Inventor: John Erik Aasted Sørensen