Quimbee logo
DMCA.com Protection Status
From our private database of 19,800+ case briefs...

Blonder-Tongue Laboratories v. University of Illinois Foundation

United States Supreme Court
402 U.S. 313, 91 S.Ct. 1434 (1971)



In a prior infringement action, a patent held by the University of Illinois Foundation (Foundation) (plaintiff) was determined to be invalid. Thereafter, the Foundation brought this action against Blonder-Tongue Laboratories (Blonder-Tongue) (defendant) in the district court for alleged infringement of the same patent. The Foundation was allowed to maintain this infringement action against Blonder-Tongue in the district court, and the Foundation prevailed at trial. The court of appeals affirmed the district court’s judgment in favor of the Foundation. Blonder-Tongue appealed to the United States Supreme Court, arguing that nonmutual collateral estoppel precluded the Foundation’s maintenance of this subsequent infringement action because the patent’s invalidity was established in the earlier action.

Rule of Law


Holding and Reasoning (White, 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 511,000 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 511,000 law students have relied on our case briefs:

  • Written by law professors and practitioners, not other law students. 19,800 briefs, keyed to 985 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.

Questions & Answers

Have a question about this case?

Sign up for a free 7-day trial and ask it

Sign up for a FREE 7-day trial