( February 24, 2020, 11:45 AM EST) -- ALEXANDRIA, Va. — In a Feb. 20 petition for inter partes review (IPR) filed with the Patent Trial and Appeal Board, Samsung Electronics Co. Ltd. requests cancellation of four claims of a patent relating to processes for feeding back beamforming information from a receiver to a transmitter (Samsung Electronics Co. Ltd. v. Bell Northern Research LLC, No. IPR2020-00613, PTAB)....