Sonohm accuses Superlogics of infringing two patents, U.S. 6,651,207, related to improved voice quality in cordless communications utilizing frequency hopping, and U.S. 7,106,705, which is directed to methods and systems for transmitting data for multiple services via jointly used physical channels. The ‘207 patent is expired, while the ‘705 patent remains in effect only through May 2021. According to the assignment records of the PTO, Sonohm acquired both patents in September 2019, after the ‘207 patent had expired. Since then, Sonohm has filed seventeen infringement suits involving the two patents, nine of which settled within about six months. The case has been assigned to Judge Burroughs.
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