Patents by Inventor Gary E. Nourse

Gary E. Nourse 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).

  • Wireless synchronization system for electronic article surveillance system
    Patent number: 4667185
    Abstract: Operation of similar electronic article surveillance (EAS) systems in proximity to each other may result in false alarms or system "shut-downs" as a result of signals transmitted from one system being detected in the receiver circuits of the other systems. This may especially occur with EAS systems in which the receivers are only activated during quiescent intervals between transmitted bursts, such that if the systems are unsychronized, the transmitted bursts of the one system may occur during the quiescent intervals of the other system. In the present invention, synchronization is effected by responding to RF detected during the quiescent intervals and preventing the transmitted bursts from occurring during the quiescent intervals of the other system.
    Type: Grant
    Filed: December 6, 1985
    Date of Patent: May 19, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gary E. Nourse, James E. Fergen, Peter J. Zarembo
  • Variable frequency RF electronic surveillance system
    Patent number: 4609911
    Abstract: An electronic article surveillance system is disclosed, having a transmitter means for producing in an interrogation zone sequences containing a plurality of discrete different radio frequencies thereby causing a circuit present within the zone to resonate at its resonant frequency in response to energy absorbed at at least three different frequencies. A receiver means is provided to cause an alarm in the event of detection of three such resonances over two successive sequences.
    Type: Grant
    Filed: July 19, 1985
    Date of Patent: September 2, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gary E. Nourse, Dean M. Dowdle
  • Variable frequency RF electronic surveillance system
    Patent number: 4531117
    Abstract: An electronic article surveillance system is disclosed, having a transmitter means for producing in an interrogation zone sequences containing a plurality of discrete different radio frequencies thereby causing a circuit present within the zone to resonate at its resonant frequency in response to energy absorbed at at least three different frequencies. A receiver means is provided to cause an alarm in the event of detection of three such resonances over two successive sequences.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: July 23, 1985
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gary E. Nourse, Dean M. Dowdle