No. 17-1594October Term 2018Decided Jun 10, 2019
Return Mail, Inc. v. Postal Service
Federal agencies cannot invoke these America Invents Act patent review proceedings unless Congress clearly includes the government.
Case status
- Current stage
- Decided
- Latest event
- Decision released Jun 10, 2019
- What it's about
Return Mail sued the U.S. Postal Service for patent infringement, prompting the USPS to petition for a patent review. The Supreme Court decided that the federal government is not considered a "person" capable of instituting patent review proceedings under the Leahy-Smith America Invents Act.
Question presented
Whether the government is a "person" who may petition to institute review proceedings under the Leahy-Smith America Invents Act.
- Case path
United States Court of Appeals for the Federal Circuit / Decision released Jun 10, 2019
- Area
Decided Supreme Court case
Briefing
What it's about
Return Mail sued the U.S. Postal Service for patent infringement, and the Postal Service tried to challenge the patent through a review process created by the America Invents Act. On June 10, 2019, the Supreme Court decided that the federal government is not a "person" allowed to start that kind of patent review proceeding under the law.
Vote
The Court decided on June 10, 2019 that the federal government is not a "person" that may petition for review under the America Invents Act. The prompt does not provide the vote count or opinion lineup.
Impact
The decision limits how federal agencies can fight issued patents. For example, an agency accused of patent infringement cannot use these America Invents Act review procedures if the statute reserves them to a "person."
What's next
The Supreme Court has finished this case. The practical result is that the Postal Service could not use that review path against Return Mail's patent, and similar disputes must proceed under other available patent rules.
What was the core dispute in Return Mail, Inc. v. Postal Service?
The case asked whether the federal government counts as a "person" under the America Invents Act. That mattered because only a "person" may start certain patent review proceedings.
What are the real-world consequences of the Court's decision?
Federal agencies have fewer tools to challenge issued patents through these review proceedings. Patent owners suing the government may face a different litigation path than private companies do.
What was the next procedural step after the Supreme Court's decision?
There was no further Supreme Court step on this docket action. The case returned to the ordinary patent dispute process with the Court's interpretation in place.
Decision
What the Court decided
Federal agencies cannot invoke these America Invents Act patent review proceedings unless Congress clearly includes the government.
Impact
The decision limits how federal agencies can fight issued patents. For example, an agency accused of patent infringement cannot use these America Invents Act review procedures if the statute reserves them to a "person."
Not official Court text.
Opinion documents
Related cases




Grounding
- Grounding
- Primary materials plus reporting.
- Note
- Best-effort analysis: this explainer relies on a mix of primary materials and trusted secondary sources. Official filings and opinions remain authoritative.
- Checked
- Jun 1, 2026
- Method
- Methodology
Primary materials11
Supreme Court docket 17-1594
docket | Jun 1, 2026
Primary case document
Supreme Court document | Jun 1, 2026
CourtListener docket record
docket | Jun 1, 2026
Questions Presented
brief | Mar 31, 2026
opinion
opinion | Jun 10, 2019
Petition
brief | May 14, 2018
Lower Court Orders/Opinions
order | Feb 16, 2018
SupremeCourt.gov
official | Jun 1, 2026
SupremeCourt.gov
official | Jun 1, 2026
SupremeCourt.gov
official | Jun 1, 2026
SupremeCourt.gov
official | Jun 1, 2026