Some challenged claims of DeepSig Inc.'s patent directed to a method for correcting distortion of radio signals are unpatentable as obvious over prior art, the Patent Trial and Appeal Board said, in an inter partes review by Digital Global Systems Inc. The board determined that some challenged claims are obvious over prior art that discloses an apparatus and method for mitigating impairments of a transmit signal; systems, methods, and devices for automatic signal detection with temporal feature extraction within a spectrum; and adaptive channel coding using machine-learned models.
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