AdvertisementThe Quest For The Perfect ToothbrushDecember 27, 2012Joe PalcafacebookEmailA drawing from Michael Davidson's 2012 patent for "Toothbrush And Method Of Using The Same." (U.S. Patent and Trademark Office)
A drawing from Michael Davidson's 2012 patent for "Toothbrush And Method Of Using The Same." (U.S. Patent and Trademark Office)