ATT logo and slogan Posted on June 24, 2015 by admin ATT logo and slogan Sign - Symbol - Watermark - Trademark - Company logo. The below image is of the ATT logo and slogan showing the sign by itself or the logo including the brand name of the relevant organization. ATT logo and slogan Tags: att, att brand, att logo, att logo and slogan, att logos, att sign, att symbol, att trademark