Patents by Inventor Steven D. Roper

Steven D. Roper 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).

  • PRINTED LIGHT-EMITTING DIODE CIRCUIT FOR ITEM VALIDATION
    Publication number: 20140266749
    Abstract: Ink-printed electric circuits including light-emitting diodes (LEDs) for validation of items is disclosed. In one embodiment, the flexible circuit includes a pliant substrate, and an ink-printed electric circuit. The ink-printed electric circuit comprises at least one ink-printed LED printed on the pliant substrate. The ink-printed electric circuit is configured to couple to a power source, determine an open circuit condition, and cause the at least one LED to transition from a first state to a second state upon determining the open circuit condition.
    Type: Application
    Filed: August 27, 2013
    Publication date: September 18, 2014
    Applicant: Lockheed Martin Corporation
    Inventors: Toby D. Thomas, Steven D. Roper, Becky B. Wallace, Joseph G. Metzger