M-Red Inc., a subsidiary of publicly traded Quest Patent Research Corporation (QPRC), has sued BBK Electronics (OnePlus) (2:21-cv-00297) over the provision of smartphones incorporating certain Qualcomm systems-on-chip (SoCs) that use oscillator circuits and on-chip temperature sensors for power management. The NPE asserts the same five patents, received in March 2019 from Intellectual Ventures LLC (IV), at issue in March 2021 complaints filed separately against Mitsubishi Electric, Nintendo, and Xiaomi, two of which suits remain active in the earliest stages.