Patents by Inventor William J. Kidwell

William J. Kidwell 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: 4448832
    Abstract: A three dimensional woven composite is constructed of strands of graphite composite forming a basic geometric structure comprising a combination of regular octahedron and tetrahedron prisms alternately and regularly spaced. The framework of the geometric structure has one central intersection made up of twelve arms of strands and adjacent incomplete intersections of four or seven arms or strands.
    Type: Grant
    Filed: April 25, 1983
    Date of Patent: May 15, 1984
    Inventor: William J. Kidwell
  • Patent number: 4345258
    Abstract: A projection and display system utilizes a modulated laser beam whose energy distribution in the "P" and "S" polarization planes is controlled by a half wavelength retardation plate. The laser beam is then deflected along the X and Y axes and passes through a dichroic polarizer cube which splits the beam to focus upon a P channel smectic liquid crystal display cell and an S channel smectic liquid crystal display cell to selectively form images on one or both of the display cells. At the same time, the formed images are projected by the use of light that is split into two colored light beams by a second dichroic cube and is reflected to back light the images in each of the display cells. The projected beams then pass back through the first dichroic cube where they are recombined and passed through a projection lens system to a suitable display screen. To selectively erase the information on either of the display cells, an AC bias is applied to that display cell during the laser scan thereof.
    Type: Grant
    Filed: December 15, 1980
    Date of Patent: August 17, 1982
    Assignee: The Singer Company
    Inventors: Robert C. Tsai, William J. Kidwell