Last month, Koss Corporation hit five defendants with separate patent infringement complaints, filed in the Western District of Texas, targeting the provision of wireless devices, including wireless earphones, headphones, speakers, and smartwatches. One of them has just fired back. In a new Northern District of California case (5:20-cv-05504), Apple accuses Koss of violating a “Confidentiality Agreement” effective between the parties in August 2017: “. . . having enticed Apple to participate in discussions, reveal information, and forego some of its legal options, Koss could not use Apple’s participation against it as a ‘gotcha’ to bring claims in a later litigation . . .That, however, is exactly what Koss did”.