The mark consists of a highly stylized letter "A" within a circle, all drawn in black outline. The circle is broken in the upper-right with the wording "ACTIVE LUMBAR" extending from just inside the circle, through the break in the circle, to the right outside the circle. A stylized horizontal line crosses the circle, dividing the circle and creating the bar across the letter "A". The area inside the circle below the horizontal line is dark gray in color. The angled arms of the letter "A" extend the entire diameter of circle and are green in color. The horizontal line between the angled arms has the shape of an EKG signal. The background area to the left of the stylized letter "A" above the horizontal line is light gray in color. The background area above the horizontal line is white in color between the arms of the stylized letter "A" and to the right of the letter "A". The entire mark is depicted on a white background. The color white is used in the design to designate background and is not claimed.