Patents by Inventor John David Wiltshire

John David Wiltshire 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).

  • Recording surface relief microstructure
    Patent number: 6753989
    Abstract: A method of recording a surface relief microstructure in a record medium includes: i) causing a coherent reconstruction or replay beam to impinge on a holographic optical element assembly, the holographic optical element assembly including a holographic optical element (HOE), the assembly causing selected portions of the beam to interfere at a focal region after diffraction by the holographic optical element so as to reconstruct a real image of an aperture previously used to construct the HOE; ii) locating a record medium at the focal region so that the real image is recorded; and, iii) causing relative movement between the record medium and the interfering beam portions and repeating steps i) and ii) so that the real image is recorded at a plurality of locations or pixels on the record medium.
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: June 22, 2004
    Assignee: De la Rue International Limited
    Inventors: Brian William Holmes, John David Wiltshire
  • Recording surface relief microstructure
    Publication number: 20030152380
    Abstract: A method of recording a surface relief microstructure in a record medium comprises:
    Type: Application
    Filed: July 24, 2002
    Publication date: August 14, 2003
    Applicant: DE LA RUE INTERNATIONAL LIMITED
    Inventors: Brian William Holmes, John David Wiltshire
  • Recording surface relief microstructure
    Publication number: 20030026613
    Abstract: A method of recording a surface relief microstructure in a record medium comprises:
    Type: Application
    Filed: July 26, 2002
    Publication date: February 6, 2003
    Applicant: DE LA RUE INTERNATIONAL LIMITED
    Inventors: Brian William Holmes, John David Wiltshire