Printing Industries of America filed petitions last week with the U.S. Patent and Trademark Office (USPTO) in an effort to nullify two digital workflow patents that have been the basis for lawsuits against printing companies. The petitions seek an inter partes review by the USPTO of the patents’ validity. The patent owner has aggressively sought licensing fees from dozens of printing companies and has sued many of them for infringement. The patents broadly address methods for receiving custom...