Patents by Inventor Jeffrey Roper

Jeffrey Roper 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).

  • Piston
    Patent number: 5267505
    Abstract: A piston having a crown, a head land depending downwardly from the crown, a skirt and at least one groove between the head land and the skirt to receive a piston ring wherein the head land is provided with a part which has a greater cross-sectional dimension than any portion of the piston between said part and the skirt.
    Type: Grant
    Filed: July 24, 1992
    Date of Patent: December 7, 1993
    Assignee: Vickers PLC
    Inventor: Jeffrey Roper