Patents by Inventor Leonard Nunley

Leonard Nunley 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).

  • Patent number: 4807287
    Abstract: A system for authenticating a document includes a uniqueness characteristic reader to generate a first identifier for the document. The identifier is then encrypted and optionally encoded to define an error correction code. The encrypted identifier and the optional error correction code are combined in accordance with a predefined format to define a code which is stored on the document itself (such as on a magnetic stripe). Authentication of the document is accomplished by reading the code on the item. The code is then processed to identify the location and quantity of any erroneous data. The identified location and quantity information for erroneous data, in conjunction with the optional error correction code, is then utilized to correct all errors in at least the encrypted identifier portion of the code read from the storage medium. The resultant encrypted identifier is therefore retrieved from the storage medium on the item without error.
    Type: Grant
    Filed: April 6, 1987
    Date of Patent: February 21, 1989
    Assignee: Light Signatures, Inc.
    Inventors: Frank D. Tucker, Leonard Nunley