Patents by Inventor Lloyd R. Walker

Lloyd R. Walker 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: 4169285
    Abstract: A method is described wherein quantifiable data which have arbitrary dynamic ranges and which vary as a function of other parameters are represented in color. A set of subranges, without restriction in number, representing data properties are associated with a color set in such a way that the colors are perceived to be maximally differentiable by interpreters, whether human, electronic, or other, by specifically incorporating information concerning the normal or anomalous characteristics of the interpreter's color perception when determing the color set. The method further provides for the realization of color displays by directly associating the colors with densities, transmittances, or illumination levels for negatives, positives, or colored light emitting devices, whether the realization requires primary additive or primary subtractive hues.
    Type: Grant
    Filed: December 7, 1977
    Date of Patent: September 25, 1979
    Assignee: Sefel J. & Associates Inc.
    Inventor: Lloyd R. Walker
  • Patent number: D297009
    Type: Grant
    Filed: March 27, 1987
    Date of Patent: August 2, 1988
    Assignee: Fujitsu Limited
    Inventors: Douglas H. Grambush, Lloyd R. Walker
  • Patent number: D315714
    Type: Grant
    Filed: January 18, 1989
    Date of Patent: March 26, 1991
    Inventors: Lloyd R. Walker, Jun Ito