Patents by Inventor Douglas Lehat

Douglas Lehat 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).

  • Contact lens including elements for filtering ultraviolet light, blue light, and polarized light
    Patent number: 6811257
    Abstract: The present invention comprises a design for contact lenses that enhances the comfort and well being of the wearer. One embodiment comprises a layer of material that filters polarized light. A second embodiment comprises a layer of material that filters light in the blue part of the light spectrum. The present invention also discloses a contact lens, which includes a central portion of light sensitive material that filters sunlight in proportion to the amount of light penetrating the lens, and is covered with a layer of light filtering material. This light filtering material may either be designed to filter polarized light or light in the blue spectrum.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: November 2, 2004
    Inventor: Douglas Lehat
  • Ash tray
    Patent number: D434874
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: December 5, 2000
    Inventor: Douglas Lehat