Patents by Inventor Larry D. Roll

Larry D. Roll 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).

  • Lift hole plug
    Publication number: 20080236691
    Abstract: A removable plug adapted to seal lifting holes in tubular conduits. The plug includes a cap member having top surface and a bottom surface, the top surface having a cavity therein to facilitate removal, the bottom surface having and a longitudinally extending shaft portion wherein radially extending fins form a generally cruciform cross section.
    Type: Application
    Filed: March 31, 2008
    Publication date: October 2, 2008
    Inventor: Larry D. Roll
  • Lift hole plug
    Patent number: D638103
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: May 17, 2011
    Inventor: Larry D. Roll