Patents by Inventor Timothy J. Zimmerman

Timothy J. Zimmerman 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).

  • Read authentication method and system for securing data stored on RFID tags
    Patent number: 7298268
    Abstract: A system and method for limiting the reading out of data from an RFID tag by requiring a reader of the tag to be authenticated by providing the correct key to the tag, static or rotating, before the tag will transmit data. The limitation of transmission is done irrespective of whether the data is encrypted or not. The system and method may have a segmented or tiered access scheme where segments or portions of the data stored in the RFID tag are accessible by differing keys. Additionally, different encryption keys or schemes may be employed to provide differing encryption methods for the data in the differing segments or portions of the data stored in the RFID tag.
    Type: Grant
    Filed: May 17, 2005
    Date of Patent: November 20, 2007
    Assignee: Intermec IP Corp.
    Inventors: Timothy J. Zimmerman, Kelly J. Ungs