Court of Appeals for the Fifth Circuit July 20, 1973, 72-3428 (Blumcraft of Pittsburgh v. Kawneer Company, Inc.)

GOLDBERG, Circuit Judge:

In the 1971 case of Blonder-Tongue Laboratories v. University of Illinois Foundation, 402 U.S. 313, 91 S.Ct. 1434, 28 L.Ed.2d 788, the Supreme Court partially overruled a long line of cases

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and held that collateral estoppel could be applied in patent infringement cases, regardless of mutuality as long as the plaintiff had a “full and fair opportunity” to litigate the