BT logo 1981 2003 Posted on June 24, 2015 by admin BT logo 1981 2003 Sign - Symbol - Watermark - Trademark - Company logo. The below image is of the BT logo 1981 2003 showing the sign by itself or the logo including the brand name of the relevant organization. BT logo 1981 2003 Tags: bt, bt brand, bt logo, bt logo 1981 2003, bt logos, bt sign, bt symbol, bt trademark