Acer (2:14-cv-04488), Lenovo (2:14-cv-04489), and Toshiba (2:14-cv-04492) are the first targets in Andrea Electronics Corporation’s (AEC’s) patent litigation campaign that asserts a group of four patents (5,825,898; 6,049,607; 6,363,345; 6,483,923). The patents-in-suit relate to digital signal interference cancelling, and the suits accuse defendants’ personal computer products of infringement. The asserted patents were developed by Lamar Signal Processing and acquired by AEC in 2000.