Patents by Inventor Graham J. Elworthy

Graham J. Elworthy 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).

  • Mounting of flexible printing plates
    Patent number: 4380956
    Abstract: Flexible printing plates are mounted in a located in-register position on the plate cylinder of a rotary printing press or equivalent cylinder of a mounter-proofer by forming matching registration holes in the printing plates and at least one carrier sheet respectively.
    Type: Grant
    Filed: September 8, 1981
    Date of Patent: April 26, 1983
    Assignee: Protocol Engineering Limited
    Inventor: Graham J. Elworthy