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