Patents by Inventor Fiona E. Davidson

Fiona E. Davidson 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).

  • Holographic film material
    Patent number: 4836628
    Abstract: Holographic film material which comprises in a silver halide emulsion layer an amount of a water-soluble compound, which does not affect the photographic properties of the silver halide emulsion and which is non-light scattering.
    Type: Grant
    Filed: April 6, 1987
    Date of Patent: June 6, 1989
    Assignee: Ciba-Geigy AG
    Inventors: James Doyle, Anthony J. Bond, Fiona E. Davidson
  • Holographic material
    Patent number: 4759594
    Abstract: Holographic material comprising on a light transparent base at least two silver halide emulsion layers wherein the shrinking factor SF, the ratio of the replay wavelength or the ratio of the thicknesses of the layer before and after processing, of each of the layers differs at least by 0.02.
    Type: Grant
    Filed: April 6, 1987
    Date of Patent: July 26, 1988
    Assignee: Ciba-Geigy AG
    Inventors: Anthony J. Bond, Glenn P. Wood, Fiona E. Davidson