Patents by Inventor Robin Edward Godfrey

Robin Edward Godfrey 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).

  • High value documents
    Patent number: 5678863
    Abstract: A means of identification or document of value which includes a paper or polymer region, in particular, bank notes, passports, identification cards or any other document of sufficient value to make it liable to be copied or counterfeited, includes a watermark in the region and a liquid crystal material applied to the region and to at least a part of the watermark to produce optical effects which differ when viewed in transmitted and reflected light.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: October 21, 1997
    Assignee: Portals Limited
    Inventors: Malcolm Robert Murray Knight, Roland Isherwood, Sarah Anne Rocca, Robin Edward Godfrey, Craig Harvey Nelson