Cyntec Company, Ltd. v. Chilisin Electronics Corp., No. 22-1873 (Fed. Cir. 2023)
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Cyntecsued Chilisin, alleging infringement of certain claims of patents directed to molded chokes and a method of manufacturing molded chokes. A choke is a type of inductor used to eliminate undesirable signals in a circuit. Chokes are found in most modern electronics that use batteries or a power supply. Before closing arguments, the district court granted judgment as a matter of law that the asserted claims were not invalid as obvious. The jury then found that Chilisin infringed the asserted claims and awarded the full amount of damages requested by Cyntec.
The Federal Circuit affirmed the judgment of infringement as supported by substantial evidence, given the court’s construction of the “by means of” limitation and its jury instruction regarding that limitation. The court reversed the judgment of nonobviousness; given the evidence, a reasonable jury could have found the asserted claims obvious in view of prior art. The court vacated the award of lost profits; the expert’s importation calculations, were unreliable and speculative and his lost profits calculation stemmed from those calculations.
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