Princeps Interface Technologies LLC has added cases against ASUSTek (5:19-cv-04298) and Lenovo (1:19-cv-01425) to the campaign that it began six weeks ago, suing Alphabet (Google), Apple, and Samsung in mid-June. The sole patent asserted generally relates to an “input device” that allows the user to switch between different input modes, including different keyboard types, with infringement allegations throughout the campaign focused on the keyboard setup features on mobile devices, as well as options allowing users to toggle between keyboards in various languages and/or a menu of emojis.