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