Patents by Inventor John Town

John Town 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).

  • Wavelength selective coatings for optical disc security
    Patent number: 7269123
    Abstract: An optical disc for data storage includes a layer of color-shifting material. Light passing through the color-shifting layer will have a color determined by the various constructive and destructive interference of the various wavelengths after they have passed through the material, diffracted while passing through the material, and are reflected off of various portions of the material, resulting in a color change when the viewing angle is changed. Additionally, an optical variable device may be defined within the disc, and may include the color-shifting layer.
    Type: Grant
    Filed: June 7, 2005
    Date of Patent: September 11, 2007
    Assignee: Optical Security Group, Inc.
    Inventors: Nigel Abraham, Mark T. Turnage, Patrick Byrne, John Town
  • Wavelength selective coatings for optical disc security
    Publication number: 20060274637
    Abstract: An optical disc for data storage includes a layer of color-shifting material. Light passing through the color-shifting layer will have a color determined by the various constructive and destructive interference of the various wavelengths after they have passed through the material, diffracted while passing through the material, and are reflected off of various portions of the material, resulting in a color change when the viewing angle is changed. Additionally, an optical variable device may be defined within the disc, and may include the color-shifting layer.
    Type: Application
    Filed: June 7, 2005
    Publication date: December 7, 2006
    Applicant: Applied Optical Technologies Holdings, Inc.
    Inventors: Nigel Abraham, Mark Turnage, Patrick Byrne, John Town