Patents by Inventor Andries Petrus Cronje Fourle

Andries Petrus Cronje Fourle 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).

  • Waveguide for transmitting RF energy through an RF barrier
    Patent number: 6388630
    Abstract: A spacer for items includes a waveguide 28.1 for radio frequency signals and a crate 16.1 or pallet. When items 16.1 to 16.9 in an array are spaced with such waveguides, signals from an interrogator 12 of an RF electronic identification system 10 are guided via the waveguide to transponders 14.1 to 14.9 of the system mounted on the items. Response signals from the transponders are similarly guided in the reverse direction, so that the transponders may be read. The spacer, arrangement and methods according to the invention alleviate the problems presented by an RF barrier in prior art systems.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: May 14, 2002
    Assignee: Supersensor (Proprietary) Limited
    Inventors: Johan Dawid Kruger, Christopher Gordon Gervase Turner, Andries Petrus Cronje Fourle, Herman Pieterse