This educational guide is based on the linked primary sources. It is not a Court publication, is not affiliated with the Court, and is not legal advice.
In brief
Overview
According to eBay Inc., eBay Inc. argues that the appellate court’s rule presumes three of the four traditional injunction factors are satisfied whenever a jury finds a patent valid and infringed.
According to eBay Inc., eBay Inc. contends that the public interest does not justify denying an injunction in this case.
According to Mr. Phillips, mr. Phillips states that the district court found full infringement trials appropriate based on the balance of hardships, and that finding has not been challenged on appeal.
Mr. Phillips suggests that monetary damages are sufficient and that the right to exclude will be protected by enhanced damages and possibly future injunctive relief.
Background and question before the Court
According to eBay Inc., the case centers on whether the appellate court’s rule that three of the four injunction factors are irrebuttably presumed satisfied when a jury finds a patent valid and infringed should apply.
What each side argues
eBay Inc. (Petitioner)
According to eBay Inc., eBay asserts that the three‑factor presumption should apply because a jury has already found the patent valid and infringed.
According to eBay Inc., eBay contends that the public interest does not justify refusing an injunction in this case.
According to Mr. Phillips, eBay points to the district court’s finding that full infringement trials are appropriate based on the balance of hardships, a finding that has not been challenged.
MercExchange, L.L.C. (Respondent)
Source-limited. The record does not yet support a complete account.
What happened at oral argument
According to Chief Justice Roberts, chief Justice Roberts stated that the Court would hear argument next in eBay v. MercExchange.
Justice Ginsburg asked whether the issue was addressed in Judge Bryson’s decision.
According to Justice Scalia, justice Scalia questioned whether it is common for a court to deny the return of property to its owner.
Chief Justice Roberts asked why the Court should draw a distinction between the sole inventor who needs a patent‑speculation firm and others regarding injunction leverage.
According to Chief Justice Roberts, chief Justice Roberts questioned the rationale for denying an injunction when infringement was not willful.
Justice Breyer asked a follow‑up question (text not provided).
Justice Stevens asked a question (text not provided).
- [1] 8ae2e10903627b4b1af2-r1-603600e9155e281b.pdf, p. 3
- [2] 8ae2e10903627b4b1af2-r1-603600e9155e281b.pdf, p. 4
- [3] 8ae2e10903627b4b1af2-r1-603600e9155e281b.pdf, p. 6
- [4] 8ae2e10903627b4b1af2-r1-603600e9155e281b.pdf, p. 22
- [5] 8ae2e10903627b4b1af2-r1-603600e9155e281b.pdf, p. 35
- [6] 8ae2e10903627b4b1af2-r1-603600e9155e281b.pdf, p. 35
- [7] 8ae2e10903627b4b1af2-r1-603600e9155e281b.pdf, p. 53
What the Court decided
Why it matters
Terms to know
No glossary terms are available for this guide.
Primary sources
Read the source materials on the official site or open the immutable repository copy used for this guide.
- 8ae2e10903627b4b1af2-r1-603600e9155e281b.pdforal argument transcript
Guide generated September 21, 2026. Automated validation accepted this version.