In June 2019, Princeps Interface Technologies LLC launched its sole litigation campaign with three District of Delaware lawsuits, one each against Alphabet (Google), Apple, and Samsung, about a month later adding another suit there against Lenovo (Motorola Mobility) and a suit against ASUSTek in the Northern District of California. A single patent—generally related to an “input device” that allows the user to switch between different input modes, including different keyboard types—was asserted in the complaints, a patent that RPX noted appeared to have been received by Princeps three weeks before the NPE’s actual formation in Delaware. In early September, Google filed a motion challenging the plaintiff’s standing at the time of filing, noting that “[a]ny assignment purporting to convey rights to a non-existent entity is ineffective”. Princeps has subsequently moved to dismiss all five of its complaints, without prejudice. Apple, which had filed an answer in Delaware, has now filed a complaint (3:19-cv-06352) seeking a declaratory judgment from the Northern District of California that it has not infringed that same keyboard patent.