Patents by Inventor Philip J. Stafford

Philip J. Stafford 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).

  • Tamper detection arrangements, and point of sales systems employing same
    Patent number: 11636565
    Abstract: Authenticity of a sticker (e.g., a mark-down sticker on a retail item), or integrity of a closure (e.g., on a delivery bag or package), is confirmed by reference to spatial information. In some embodiments a fingerprint is formed from parameters describing spatial placement of a sticker or pattern on a substrate. In some embodiments a digital watermark pattern provides a spatial frame of reference within which one or more other features can be located. A great many other features and arrangements are also detailed.
    Type: Grant
    Filed: July 23, 2020
    Date of Patent: April 25, 2023
    Assignee: Digimarc Corporation
    Inventors: Eric D. Evans, Arthur L. Powell, Becky G. Kiichle-Gross, Geoffrey B. Rhoads, Philip J. Stafford, Utkarsh Deshmukh