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eBay Inc. v. MercExchange, L.L.C.

No. 05-130 SCOTUS · Decided Decided SCOTUS


The Conclusion

**The Supreme Court held that permanent injunctions in patent cases are not automatically available and must be evaluated under the traditional four-factor equitable test.** Patent holders cannot rely on a categorical rule; courts retain discretion in deciding whether to grant injunctive relief even when infringement is established.

CourtSupreme Court of the United States
FiledMay 15, 2006
CL StatusActive
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No circuit court data for this case.

Cert Granted -
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Filed (CL) -
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SCOTUS TMR-8599f90e Jun 14, 2026

Case Analysis

Overview

Rejected a categorical rule granting permanent injunctions in patent cases, requiring courts to apply the traditional four-factor equitable test. Reasserted that equitable remedies are discretionary, not automatic, even when a right is established.

Conclusion

**The Supreme Court held that permanent injunctions in patent cases are not automatically available and must be evaluated under the traditional four-factor equitable test.** Patent holders cannot rely on a categorical rule; courts retain discretion in deciding whether to grant injunctive relief even when infringement is established.

Notes

Unanimous. Thomas wrote majority. Replaced automatic-injunction rule with discretionary equitable analysis. Roberts concurrence (with Scalia/Ginsburg) and Kennedy concurrence shaped how lower courts apply the test.

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