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Blonder-Tongue Labs, Inc. v. University of Illinois Foundation

United States Court of Appeals for the Seventh Circuit · Civil Procedure

Civil ProcedureCollateral EstoppelPatent Litigationcollateral estoppelissue preclusionpatent invalidityobviousnessprior adjudication

Facts

The plaintiff owned a patent and sought to assert its validity in this action. The defendant raised collateral estoppel based on an earlier case, Winegard, in which courts had adjudicated the patent invalid. On appeal, the plaintiff argued that the Winegard courts had purported to apply Graham standards on obviousness but had done so defectively. The asserted defect was the prior courts' reliance on the proposition that Isbell's results, though unpredictable, were achieved by logical exploration within known principles.

Issue

Whether the plaintiff patent owner was collaterally estopped by the prior Winegard adjudication of invalidity from asserting the validity of its patent in this action. More specifically, the question was whether alleged defects in the reasoning of the prior courts' obviousness analysis justified denying estoppel effect to the earlier judgment.

Rule

A court considering a plea of collateral estoppel may not review the reasoning of the court that made the prior adjudication in order to reexamine whether that earlier court reasoned correctly. Where the prior courts grasped the technical subject matter and issues in suit, any claimed error in reasoning that is not of the magnitude contemplated by the Supreme Court does not justify denying estoppel effect to the earlier judgment.

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One of 10 multiple-choice questions for this case. Pick an answer to see why.

North Shore Imaging, a patent owner in Milwaukee, previously litigated its sensor patent against Lakefront Devices in Oregon, where the patent was held invalid for obviousness. In a later suit in Chicago against Meridian Optics, North Shore argues the Oregon judge misapplied the obviousness framework but does not contend that the earlier court failed to understand the technology or issues.

How should the Chicago federal court rule on Meridian Optics's plea of collateral estoppel?

Explanation. The majority held that when considering collateral estoppel based on a prior invalidity judgment, the second court may not review the reasoning of the first court simply to decide whether that court reasoned correctly. Where the prior court grasped the technical subject matter and issues, an asserted defect in the prior court's obviousness reasoning is not enough, by itself, to defeat estoppel. (Derived from Blonder-Tongue Labs, Inc. v. University of Illinois Foundation (n.d.).)