Patents by Inventor Bradley W. Walton

Bradley W. Walton 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).

  • Game ticket confusion patterns
    Patent number: 5667250
    Abstract: Security of game cards such as instant lottery tickets can be improved by locating a confusion pattern below a primer layer on the game cards substrate and by locating another confusion pattern on a release coat above the game card play indica. Game card security can be further enhanced by using confusion pattern ink that bleeds through the game card in response to the application of various solvents.
    Type: Grant
    Filed: August 12, 1994
    Date of Patent: September 16, 1997
    Inventors: William F. Behm, Mark C. Tevis, Bradley W. Walton, Stanley Litman
  • Information bearing article with tamper resistant scratch-off opaque coating
    Patent number: 4726608
    Abstract: An indicia bearing article, such as a lottery ticket, contest form or other document, for example, is provided. The article includes an indicia bearing sheet and an opaque coating thereover for hiding the indicia. The opaque coating contains metal particles and at least one undissolved dye soluble in at least one solvent and dispersed in the opaque coating and hidden beneath the metal particles, for providing visual evidence of exposure to the solvent.
    Type: Grant
    Filed: August 5, 1986
    Date of Patent: February 23, 1988
    Assignee: Scientific Games of California, Inc.
    Inventor: Bradley W. Walton