FourThird logo Posted on June 26, 2015 by admin FourThird logo Sign - Symbol - Watermark - Trademark - Company logo. The below image is of the FourThird logo showing the sign by itself or the logo including the brand name of the relevant organization. FourThird logo Tags: fourthird, fourthird brand, fourthird logo, fourthird logos, fourthird sign, fourthird symbol, fourthird trademark