Ever Wonder where the Modern Toothbrush got its Current Design? Dr. Gaby’s Patent is widely incorporated in today’s Common Toothbrush. Innovative at the time it had become a part of every household and an global industry standard. The Original Patent is for a toothbrush of which the bristles 2 have, on the active part 1 of the brush, a length which increases going from the handle 3 to the free end of the semicircular active part 1, are arranged in spaced groups with a curvilinear-line profile, and of which the handle 3 is round, of increasing diameter and advantageously curved. This Patent later evolved into an Improved Toothbrush which is characterised by the fact that the head 2 supporting the bristles 3 has a substantially semi-circular cross-section and that the handle 1 has a curved shape of circular cross-section.