Knobbe Martens Secures 11th Circuit Appellate Victory for Longtime Client Masimo

Knobbe Martens, one of the leading intellectual property and technology law firms in the United States, achieved a victory at the U.S. Court of Appeals for the 11th Circuit for Masimo Corp., a global medical technology company based in Irvine.

In 2013, the plaintiffs filed a class action lawsuit against Masimo, the University of Alabama Institutional Review Board, and several doctors who participated in a nationwide study on the possible effect of oxygen saturation levels on premature infants. The plaintiffs, who filed on behalf of their participant children, claimed that, even though all participants in the study were kept within the standard of care for oxygen saturation levels, the study “increased the risk” that participants might develop vision loss or reduced brain function.

On March 30, 2018, the 11th Circuit upheld the district court’s 2015 grant of summary judgment of no liability for all the defendants.

“Masimo’s technology has helped millions of people, and their willingness to support important clinical research is crucial to further improving the standard of care for patients,” said Managing Partner Steven Nataupsky. “We’re proud to have achieved this appellate victory for Masimo, so that they can continue to participate in clinical studies in the future. The Knobbe attorneys involved possess deep knowledge of Masimo’s products and technology and extensive litigation experience. Combining this knowledge and experience with seamless collaboration with Masimo for more than 20 years helped secure a total victory.”

The team of lawyers included Joe Re, Steve Jensen, Payson LeMeilleur, Joe Cianfrani and Cameron Jahansouz.

About Knobbe Martens

Consistently ranked among the top intellectual property firms in the nation and worldwide, Knobbe Martens has over 275 lawyers and scientists nationwide and dedicates its practice to all aspects of intellectual property and technology law, including litigation. Knobbe Martens serves a diverse group of clients from multinational corporations to emerging businesses of all stages. The firm is headquartered in Orange County, California, with offices in Los Angeles, New York, San Diego, San Francisco, Seattle and Washington, D.C., and enjoys an international reputation for excellence. More information about the firm can be found at

Contact: Nicholas Gaffney 415-732-7801