Patents by Inventor Robert S. Lundgren

Robert S. Lundgren 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).

  • Pipe protector
    Patent number: 4205707
    Abstract: A pipe or rod protector includes structure to interfit the pipe or rod end, such structure including an end cap and a split ring tightenable to retain the structure on the pipe or rod end.
    Type: Grant
    Filed: December 11, 1978
    Date of Patent: June 3, 1980
    Assignee: Hydril Company
    Inventor: Robert S. Lundgren