Patents by Inventor Christopher J. Groves-Kirkby

Christopher J. Groves-Kirkby 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).

  • Optical data storage
    Patent number: 5061582
    Abstract: The invention describes an optical data storage medium in which the optical contrast of stored data bits is enhanced by the use, as a photosensitive material or as an additional photosensitive material, of a layer of a photochromic fulgide.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: October 29, 1991
    Assignee: Plessey Overseas Limited
    Inventors: Jack Brettle, Ian Bennion, Christopher J. Groves-Kirkby
  • Optical resonant assembly
    Patent number: 4834511
    Abstract: An optical resonant assembly which has at least two stable light transmittance values dependent on incident light beams. The assembly consists of a pair of parallel partially transmission mirrors with a photochromic layer placed therebetween which has a refractive index dependent upon the intensity of incident light beams. The parallel mirrors constitute a Fabry-Perot type resonator. The incident light beams have the effect of "couloring" or "bleaching" the photochromatic material.
    Type: Grant
    Filed: August 5, 1986
    Date of Patent: May 30, 1989
    Assignee: Plessey Overseas Limited
    Inventors: Ian Bennion, Rosemary Cush, Christopher J. Groves-Kirkby