Engineer Solves Printer Problems with 39 Toner Patent Inventions. Toner News Mobile › Forums › Toner News Main Forums › Engineer Solves Printer Problems with 39 Toner Patent Inventions. Tonernews.com, August 10, 2021. USA This topic is empty. Viewing 1 post (of 1 total) Author Posts #321363 tonerKeymaster Author August 10, 2021 at 10:46 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