The mark consists of the three symmetrical dot pattern reliefs depicted on the brush; the top of the toothbrush (the non-bristle side) bears two symmetrical dot pattern reliefs and the bottom of the toothbrush (the bristle side) bears one symmetrical dot pattern relief; the top back end comprising a series of symmetrically placed protruding dots of graduated size, appearing in an arrangement of nine rows of two, three, or four dots, with each row located next to and in parallel with a row containing plus or minus one dot, the diameter and height of the dots of the top back end pattern decreasing progressively from the back end toward the middle of the top side, with the dots closest to the back end having a diameter of approximately 1.5 mm and the dots furthest from the back end having a diameter of approximately 1 mm; the top middle pattern comprising a series of seven rows of protruding dots of uniform size, the rows contain either one or two dots, and being arranged in an alternating pattern with the first and last rows each containing only one dot; and the bottom back end pattern comprising a series of seven rows of protruding dots of uniform size, these rows containing two, three, or four dots, with each row being located next to and in parallel with a row containing plus or minus one dot.