Patents Assigned to Canon Sales, Inc.
  • Document authentication using a mark that is separate from document information
    Patent number: 6496933
    Abstract: A digital mark is derived or created for placement on a document to identify, authenticate, or verify the document's origins. Private information is received and digitized. The digitized private information is scrambled in response to the document's contents. The scrambled private information is formed into a mark. The mark is placed on or in the document, apart from the document's information.
    Type: Grant
    Filed: October 14, 1998
    Date of Patent: December 17, 2002
    Assignee: Canon Sales, Inc.
    Inventor: Patrick O'Neal Nunally