Quimbee logo with url
From our private database of 15,100+ case briefs...

Allied Orthopedic Appliances, Inc. v. Tyco Healthcare Group LP

United States Court of Appeals for the Ninth Circuit
592 F.3d 991 (2010)


Tyco Healthcare Group LP (Tyco) (defendant) was a monopolist manufacturer of a pulse-oximetry system that used sensors attached to a monitor and a patient’s body to examine the patient’s blood-oxygenation level. Tyco had a patent on its sensors. Upon expiration of the patent, competitors began manufacturing generic sensors that were compatible with Tyco’s monitors. Tyco patented a new pulse-oximetry system that moved calibration coefficients from the monitors to the sensors. Placing the calibration coefficients in the sensors facilitated sensor innovation because once there was a customer base with the new monitors, Tyco could continually introduce new sensors into the market without forcing customers to buy replacement monitors each time. Tyco’s new monitors, however, were incompatible with competitors’ generic sensors. Tyco discontinued its older system. A group of hospitals and healthcare providers (plaintiffs) brought an antitrust suit based on § 2 of the Sherman Act. The district court granted Tyco’s motion for summary judgment. The plaintiffs appealed.

Rule of Law


Holding and Reasoning (Silverman, J.)

What to do next…

  1. Unlock this case brief with a free (no-commitment) trial membership of Quimbee.

    You’ll be in good company: Quimbee is one of the most widely used and trusted sites for law students, serving more than 97,000 law students since 2011. Some law schools—such as Yale, Vanderbilt, Berkeley, and the University of Illinois—even subscribe directly to Quimbee for all their law students. Read our student testimonials.

  2. Learn more about Quimbee’s unique (and proven) approach to achieving great grades at law school.

    Quimbee is a company hell-bent on one thing: helping you get an “A” in every course you take in law school, so you can graduate at the top of your class and get a high-paying law job. We’re not just a study aid for law students; we’re the study aid for law students. Read more about Quimbee.

Here's why 287,000 law students have relied on our case briefs:

  • Written by law professors and practitioners, not other law students. 15,100 briefs, keyed to 204 casebooks. Top-notch customer support.
  • The right amount of information, includes the facts, issues, rule of law, holding and reasoning, and any concurrences and dissents.
  • Access in your classes, works on your mobile and tablet. Massive library of related video lessons and high quality multiple-choice questions.
  • Easy to use, uniform format for every case brief. Written in plain English, not in legalese. Our briefs summarize and simplify; they don’t just repeat the court’s language.