Patents by Inventor David Allen Stone

David Allen Stone 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: 8551673
    Abstract: An optically variable magnetic stripe assembly includes a magnetic layer, an optically variable effect generating layer over the magnetic layer, and an electrically non-conductive reflective layer between the magnetic layer and the optically variable effect generating layer.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: October 8, 2013
    Assignee: De La Rue International Limited
    Inventors: Brian William Holmes, Malcolm Robert Murray Knight, David Allen Stone
  • Patent number: 7931207
    Abstract: An optically variable magnetic stripe assembly includes a magnetic layer, an optically variable effect generating layer over the magnetic layer, and a reflective layer between the magnetic layer and the optically variable effect generating layer. The reflective layer includes at least one metal portion.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: April 26, 2011
    Assignee: De La Rue International Limited
    Inventors: Brian William Holmes, Malcolm Robert Murray Knight, David Allen Stone
  • Publication number: 20080265040
    Abstract: An optically variable magnetic stripe assembly includes a magnetic layer, an optically variable effect generating layer over the magnetic layer, and an electrically non-conductive reflective layer between the magnetic layer and the optically variable effect generating layer.
    Type: Application
    Filed: January 9, 2007
    Publication date: October 30, 2008
    Applicant: DE LA RUE INTERNATIONAL LIMITED
    Inventors: Brian William Holmes, Malcolm Robert Murray Knight, David Allen Stone
  • Publication number: 20080232221
    Abstract: An optically variable magnetic stripe assembly includes a magnetic layer, an optically variable effect generating layer over the magnetic layer, and an electrically non-conductive reflective layer between the magnetic layer and the optically variable effect generating layer.
    Type: Application
    Filed: February 4, 2008
    Publication date: September 25, 2008
    Applicant: DE LA RUE INTERNATIONAL LIMITED
    Inventors: Brian William Holmes, Malcolm Robert Murray Knight, David Allen Stone
  • Patent number: 6296281
    Abstract: A latent image structure of a highly secure nature in which two latent image are superimposed. Each of the superimposed latent images is viewable from a different line of sight. Relief elements define, for each latent image, portions of respective linear relief structures providing an image and a background which cooperate to generate the latent image. Relief elements are only provided at locations where the linear relief structures of the first and second latent images intersect. The resultant latent image structure, when viewed normally, has the advantage of a relatively flat appearance, making it difficult to discern the presence either of the superimposed latent images.
    Type: Grant
    Filed: April 18, 2000
    Date of Patent: October 2, 2001
    Assignee: De La Rue International Limited
    Inventor: David Allen Stone