Patents by Inventor Edwin Hopton

Edwin Hopton 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).

  • Electronic article security system employing variable time shifts
    Patent number: 6249229
    Abstract: A pulse-listen electronic article security (EAS) system for detecting the presence of a security tag within a detection zone is disclosed. The EAS system includes a transmitter for radiating a first electromagnetic signal into the detection zone. The first electromagnetic signal is a time sequence of RF bursts emitted during each of a plurality of contiguous frame intervals in which the duration of each of the frame intervals is one of a plurality of different values. The EAS system also includes a receiver synchronized with the transmitter for receiving a second electromagnetic signal re-radiated from a security tag in the detection zone in response to the first electromagnetic signal. The receiver provides an output signal if a security tag is detected.
    Type: Grant
    Filed: August 16, 1999
    Date of Patent: June 19, 2001
    Assignee: Checkpoint Systems, Inc., a Corp. of Pennsylvania
    Inventors: Eric Eckstein, John Davies, Edwin Hopton, Nimesh Shah, Bent Svendsen