Patents Represented by Law Firm Harenss, Dickey & Pierce
  • Sign readable at speed
    Patent number: 5165186
    Abstract: A sign having an array of elements each comprising a first lens, a second lens and an optical object in registry with the first and second lenses such that the virtual image of the optical object formed in the second lens lies in the focal surface of the first lens. The optical objects are a representation of the information which the sign is to present. The image of the optical objects seen by a viewer moving past the sign appears to be stationary with respect to the viewer.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: November 24, 1992
    Assignee: Cassel-Smith Limited
    Inventor: Edwin J. Smith