Patents by Inventor Dennis M. Cunningham

Dennis M. Cunningham 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).

  • Metal detector system having multiple, adjustable transmitter and receiver antennas
    Patent number: 5397986
    Abstract: A metal detector system includes two transmitter-receiver antenna pairs supported by respective side panels of a portal. The relative positions of an adjacent transmitter antenna and receiver antenna within an antenna pair may be adjusted to calibrate the antennas, such as by crossing adjacent antennas or by increasing the distance between adjacent antennas.
    Type: Grant
    Filed: May 20, 1994
    Date of Patent: March 14, 1995
    Assignee: Federal Labs Systems LP
    Inventors: Granville T. Conway, Karl E. Geisel, Dennis M. Cunningham