Patent 7622917 was granted and assigned to Scan Systems Corp. on November, 2009 by the United States Patent and Trademark Office.
Apparatus and methods for inspecting materials such as cylindrical and tubular members are disclosed. One apparatus includes a frame that supports a magnetic coil and a detector assembly, the detector assembly having one or more magnetic detectors adapted to be spaced a first distance from the material being inspected by one or more substantially frictionless members.