Patents by Inventor David Lee Wortman

David Lee Wortman 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).

  • Luminance control film
    Patent number: 6091547
    Abstract: The luminance control film includes a periodic array of optical structures which are small with respect to the wavelength of light. Scattering and diffractive effects result in improved off-axis illumination intensity in comparison with brightness enhancement optical devices having larger scale optical structures.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: July 18, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Mark Edward Gardiner, Mark Brian O'Neill, David Lee Wortman