Patents by Inventor Ralph E. Lindstrom

Ralph E. Lindstrom 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).

  • Tool for pulling underground service wire up a conduit
    Patent number: 4033551
    Abstract: This device consists primarily of telescoping tube members, which have, secured thereto, a pulley and a winch, which by line means thereon, will pull underground wire up the conduit of a meter base.
    Type: Grant
    Filed: July 6, 1976
    Date of Patent: July 5, 1977
    Inventor: Ralph E. Lindstrom