US Judge Rules Apple Watch Infringed Masimo’s Pulse Oximetry Patent

  • Masimo, a medical technology company, accused Apple of infringing on one of its pulse oximeter patents when it launched Apple Watch models that use light sensors to measure the amount of oxygen in the blood.
  • Masimo has been pushing to have the models banned in the US.
  • Apple Watch Series 6 and later models have a feature that uses light to detect the amount of oxygen in the blood.
  • In June 2021, Masimo filed a patent infringement lawsuit with the International Trade Commission (ITC).
  • On Tuesday, an ITC judge ruled that Apple infringed on one of Masimo’s patents.
  • The ITC will now consider whether to implement an import ban on Apple Watch models that include the blood oxygen monitoring feature.
  • The final determination is expected to be completed by May 10.
  • Apple disagrees with the decision and is looking forward to a full review by the Commission.
  • Masimo initially sued Apple in 2019, accusing the company of stealing trade secrets and improperly using Masimo inventions.


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