Patents Assigned to Doc's Road Boring, Inc.
  • Method of installing an underground conduit
    Patent number: 4422800
    Abstract: Disclosed is a method of installing a conduit in the earth below a grade which includes the steps of pulling a cable through the earth along the course to be traveled by the conduit and marking the ends of the cable.
    Type: Grant
    Filed: November 21, 1980
    Date of Patent: December 27, 1983
    Assignee: Doc's Road Boring, Inc.
    Inventor: Robert O. Parish