Canon Sues Optimum Imaging Tech. Over Expired Patents. (See the Lawsuit) Homepage › Forums › Toner News Main Forums › Canon Sues Optimum Imaging Tech. Over Expired Patents. (See the Lawsuit) Tonernews.com, January 4, 2021. USA This topic is empty. Viewing 1 post (of 1 total) Author Posts #268676 jimKeymaster Click Photo! Author January 4, 2021 at 11:16 AM Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In Its Free! Click Here to Share your Success Stories with Tonernews.com and We'll Publish it for You!