CommScope Technologies LLC v. Dali Wireless, Inc., No. 20-1817 (Fed. Cir. 2021)Annotate this Case
CommScope sued Dali, alleging infringement of five of CommScope’s patents relating to telecommunications technology. Dali counterclaimed, alleging CommScope infringed two of Dali’s patents also relating to telecommunications technology. One of Dali’s asserted patents, the 521 patent, is titled “System and Method for Digital Memorized Predistortion for Wireless Communication.” This technology generally relates to wireless communications with portable equipment and handsets, such as mobile phones. Such devices often include a power amplifier to boost the signal. However, amplification can cause unintended distortions to the signal. The 521 patent resolves this problem through the use of a feedback loop and lookup tables.
The district court entered judgment on the jury’s verdict of infringement, no invalidity, and damages for both CommScope and Dali. The Federal Circuit reversed with respect to the 521 patent and otherwise affirmed without opinion. Substantial evidence does not support the jury’s finding that CommScope’s FlexWave infringes Dali’s 521 patent. Dali failed to present evidence proving that the FlexWave meets the district court’s construction of the claim term “switching a controller off.”