Patents by Inventor Colin K. Marshall

Colin K. Marshall 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).

  • Apparatus and method for making a reflection hologram
    Patent number: 4707054
    Abstract: A method and apparatus for making reflection holograms wherein a film (27) of light sensitive material in which the hologram is to be formed is rotated about a first axis (Y--Y) which is itself rotated about a second axis (X--X) which intersects the first axis at a position (Z) spaced from the film so that a coherent light beam (29), which is directed onto the film and whose axis passes through the point of intersection of the axes, scans the film in a pattern of overlapping narrow bands. The bands may be rectilinear or circular.
    Type: Grant
    Filed: February 26, 1986
    Date of Patent: November 17, 1987
    Assignee: GEC Avionics Limited
    Inventors: Richard K. Howard, Colin K. Marshall