Patents by Inventor Bruce Allen Christiansen

Bruce Allen Christiansen 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).

  • Apparatus and method for protecting underground cables
    Patent number: 5962809
    Abstract: The subject underground cable assembly protection system of this invention relates to a plurality of rigid substantially impact-resistant elongate protective channel members. Each of these channel members defines an enclosed compartment for housing the cable assembly. The system of the present invention also includes means for interconnecting adjoining channel members to each other. In this way, the underground cable assembly protection system can be formed. The channel member and/or the interconnecting means can comprise a polymeric material, and more preferably an impact-resistant polymeric material such as high-impact PVC or polyurethane.
    Type: Grant
    Filed: September 26, 1997
    Date of Patent: October 5, 1999
    Assignees: Williamette Valley Company, Chempro, Inc.
    Inventors: John Farrell Duvall, Bruce Allen Christiansen