The mark consists of three concentric circles with the innermost circle containing a stylized pipe with the wording "BSDI" in a stylized font centered below the sewer and drain cleaning device and the outermost shaded circle containing the wording "NASSCO" in a stylized font with two circles, one on either side of the wording "NASSCO" following the upper arc of the circle with the wording "BUILDING SEWER & DRAIN INSPECTION" in a stylized font following the side arcs and lower arc of the circle.
Color is not claimed as a feature of the mark.
"BUILDING SEWER & DRAIN INSPECTION"